[FD] Securing SAP Systems from XSS vulnerabilities Part 2: Defense for SAP NetWeaver ABAP
From the developer’s perspective For all generic Web applications where you accept input parameters, you must use encoding methods provided by the ICF handler. The implementation of the encoding is available as an API in two variants: •ABAP built-in function ESCAPE (available as of SAP_BASIS = 731); •Class implementation in CL_ABAP_DYN_PRG. In releases higher or equal to SAP NetWeaver Release 7.0 enhancement package 3 (SAP_BASIS = 731), use the ABAP built-in function ESCAPE(). For more information, see the ABAP keyword documentation for the ESCAPE() function. HTML / XML out = escape(val = val format = cl_abap_format=e_xss_ml). JavaScript out = escape(val = val format = cl_abap_format=e_xss_js) URL out = escape(val = val format = cl_abap_format=e_xss_url) CSS out = escape(val = val format = cl_abap_format=e_xss_css) For lower releases (SAP_BASIS 702, 720 and below), there is an ABAP OO implementation. The implementation is in class CL_ABAP_DYN_PRG. Context Method HTML / XML out = CL_ABAP_DYN_PRG=ESCAPE_XSS_XML_HTML(val) JavaScript out = CL_ABAP_DYN_PRG=ESCAPE_XSS_JAVASCRIPT(val) URL out = CL_ABAP_DYN_PRG=ESCAPE_XSS_URL(val) CSS out = CL_ABAP_DYN_PRG=ESCAPE_XSS_CSS(val) For more information about the delivery of these extensions, see SAP Security Note 1582870 [4]. For WebDynpro ABAP For WebDynpro ABAP, you do not have to care about XSS at all. The security is ensured through the framework itself. For Business Server Pages (BSP) For BSP, you should use the page directives. For more information, see SAP Security Note 1600317 [5] and SAP Security Note 1638779 [6]. These BSP page attributes have the advantage that the BSP framework ensures that the most secure version of encoding is used. For BSP, you should use the page directives: /%@page language=abap forceEncode=html|url|javascript|css% / After importing SAP Security Note 1600317 [7], the existing page directives also use the updated BSP compiler that supports HTML encoding of all print statements on the page. In the following example, all print statements use HTML encoding. It only affects print statements on BSP pages and does not have anything to do with tag parameter passing that uses the same syntax, but has different semantics. BSP example: %@page language=abap forceEncode=html% htmlbodyform % data: inputvalue type string. inputvalue = request-get_form_field( 'x' ). % input type=text name=x value=%=inputvalue% input type=submit /form/body/html The global page attribute defines the default encoding used within the page and all included page fragments. Besides the global page attributes, you can use the following notations for controlling the encoding behavior of a special print event (overriding the global settings): •%html=...%: HTML encoding •%url=...%: URL encoding for parameter names or values of URLs •%javascript=...%: JavaScript encoding •%css=…% : CSS encoding •%raw=...% (no encoding, that is, a global encoding that was set in the page directive is switched off) Using forceEncode within a page directive in a page fragment has no effect. The encoding within page fragments is always controlled by the including page. For BSP Online Text Repository (OTR) One aspect that is similar to an XSS attack is a translation-related change that breaks the HTML or JavaScript code.// Example: script var msg = 'otrHello/otr'; /script input name=xyz value=otrReplace 'dog' with 'cat'/otr Therefore, there is an extra page attribute that you can set. When this attribute is set, all OTR texts are effectively encoded directly after they have been retrieved in their language-dependent form. For BSP ORT, you should use the page directives: /%@page language=abap forceEncodeOtr=html|javascript%/HTML example //%@page language=abap forceEncodeOtr=html% scriptvar msg = 'otrHello/otr';alert(msg); /script JavaScript example %@page language=abap forceEncodeOtr=html% script var msg = '%JavaScript=otrHello/otr%'; alert(msg); /script For BSP Extensions For the BSP HTMLB library, you must set the attribute forceEncode of the htmlb:content tag to ENABLED to switch on the internal encoding because it is set to disabled by default. ENABLED means that the extension will use an appropriate encoding depending on the context within a value is used: /htmlb:content forceEncode=ENABLED|BACKWARDS_COMPATIBLE/ •ENABLED: This means to always encode everything. This overwrites all other encode attributes and they no longer have to be set; •BACKWARDS_COMPATIBLE: This is the default value. The usual encode attributes are active as previously defined. In addition, the attribute design of htmlb:content specifies the possible designs as a page supports. Valid values are CLASSIC, DESIGN2002, DESIGN2003, or DESIGN2008, or combinations separated by a plus (+)
[FD] ERPSCAN Research Advisory [ERPSCAN-15-003] SAP NetWeaver Dispatcher Buffer Overflow - RCE, DoS
ERPSCAN Research Advisory [ERPSCAN-15-003] SAP NetWeaver Dispatcher Buffer Overflow - RCE, DoS Application:SAP NetWeaver Dispatcher Versions Affected:SAP NetWeaver Dispatcher, probably others Vendor URL:http://SAP.com Bugs: RCE Sent: 25.08.14 Reported: 25.08.14 Vendor response:25.08.14 Date of Public Advisory:15.02.2015 Reference:SAP Security Note 2063369 Author:George Nosenko (ERPScan) Description 1. ADVISORY INFORMATION Title: SAP NetWeaver Dispatcher Advisory ID: [ERPSCAN-05-003] Risk: Hight Advisory URL: http://erpscan.com/advisories/erpscan-15-003-sapkernel-c_sapgparam-rce-dos/ Date published: 18.06.2015 Vendors contacted: SAP 2. VULNERABILITY INFORMATION Class: Buffer overflow [CWE-119], [CWE-20] Impact: Allows an unauthorized attacker to execute remote code Remotely Exploitable: Yes Locally Exploitable: No CVE Name: CVE-2015-2815 3. VULNERABILITY DESCRIPTION SAP NetWeaver Dispatcher has the function sapac01_sapgparam() that processes the ABAP kernel call C_SAPGPARAM. This function has a buffer overflow vulnerability. The vulnerability can allow an authenticated remote attacker to execute arbitrary code. It can also lead to denial of service. 4. VULNERABLE PACKAGES • SAP KERNEL 7.00 32BIT, disp+work.exe (7000.52.12.34966) • SAP KERNEL 7.40 64BIT, disp+work.exe (7400.12.21.30308) Other versions are probably affected too, but they were not checked. 5. SOLUTIONS AND WORKAROUNDS To correct this vulnerability, install SAP Security Note 2063369. 6. AUTHOR George Nosenko (ERPScan) 7. TECHNICAL DESCRIPTION The vulnerability in SAP NetWeaver Dispatcher can allow an authenticated remote attacker to execute arbitrary code. It can also lead to denial of service. 8. REPORT TIMELINE Sent:25.08.2014 Reported:25.08.2014 Vendor response:26.08.2014 Date of Public Advisory:18.06.2015 9. REFERENCES http://erpscan.com/advisories/erpscan-15-003-sapkernel-c_sapgparam-rce-dos/ 10. ABOUT ERPScan Research The company’s expertise is based on the research subdivision of ERPScan, which is engaged in vulnerability research and analysis of critical enterprise applications. It has achieved multiple acknowledgments from the largest software vendors like SAP, Oracle, Microsoft, IBM, VMware, HP for discovering more than 400 vulnerabilities in their solutions (200 of them just in SAP!). ERPScan researchers are proud to have exposed new types of vulnerabilities (TOP 10 Web Hacking Techniques 2012) and to be nominated for the best server-side vulnerability at BlackHat 2013. ERPScan experts have been invited to speak, present, and train at 60+ prime international security conferences in 25+ countries across the continents. These include BlackHat, RSA, HITB, and private SAP trainings in several Fortune 2000 companies. ERPScan researchers lead the project EAS-SEC, which is focused on enterprise application security research and awareness. They have published 3 exhaustive annual award-winning surveys about SAP security. ERPScan experts have been interviewed by leading media resources and featured in specialized info-sec publications worldwide. These include Reuters, Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading, Heise, and Chinabyte, to name a few. We have highly qualified experts in staff with experience in many different fields of security, from web applications and mobile/embedded to reverse engineering and ICS/SCADA systems, accumulating their experience to conduct the best SAP security research. 11. ABOUT ERPScan ERPScan is one of the most respected and credible Business Application Security providers. Founded in 2010, the company operates globally. Named an Emerging vendor in Security by CRN and distinguished by more than 25 other awards, ERPScan is the leading SAP SE partner in discovering and resolving security vulnerabilities. ERPScan consultants work with SAP SE in Walldorf to improve the security of their latest solutions. ERPScan’s primary mission is to close the gap between technical and business security. We provide solutions to secure ERP systems and business-critical applications from both cyber attacks and internal fraud. Our clients are usually large enterprises, Fortune 2000 companies, and managed service providers whose requirements are to actively monitor and manage the security of vast SAP landscapes on a global scale. Our flagship product is ERPScan Security Monitoring Suite for SAP. This multi award-winning innovative software is the only solution on the market certified by SAP SE covering all tiers of SAP security: vulnerability assessment, source code review, and Segregation of Duties. The largest companies from diverse industries like oil and gas, banking, retail, even nuclear power installations as well as consulting companies have successfully
[FD] ERPSCAN Research Advisory [ERPSCAN-15-004] SAP NetWeaver Portal XMLValidationComponent - XXE
ERPSCAN Research Advisory [ERPSCAN-15-004] SAP NetWeaver Portal XMLValidationComponent - XXE Application:SAP NetWeaver Portal 7.31 Versions Affected:SAP NetWeaver Portal 7.31, probably others Vendor URL:http://SAP.com Bugs:XML eXternal Entity Sent:06.11.2014 Reported:06.11.2014 Vendor response:07.11.2014 Date of Public Advisory:18.06.2015 Reference:SAP Security Note 2098608 Author:Vahagn Vardanyan (ERPScan) Description 1. ADVISORY INFORMATION Title: SAP NetWeaver Portal 7.31 Advisory ID: [ERPSCAN-15-004] Risk: High Advisory URL: http://erpscan.com/advisories/erpscan-15-004-sap-netweaver-portal-xmlvalidationcomponent-xxe/ Date published: 15.02.2015 Vendors contacted: SAP 2. VULNERABILITY INFORMATION Class: XML External Entity [CWE-611] Impact: read file, upload file, DoS, information disclosure Remotely Exploitable: Yes Locally Exploitable: No CVE Name: CVE-2015-2812 3. VULNERABILITY DESCRIPTION The problem is caused by a program error in 'ValidationComponent' due to the incorrect use of an XML parser. By default, the parser opens external entities referenced within an XML input, which can then lead to malicious content being parsed. This malicious content can reference internal resources, such as files. These internal resources can be disclosed in the response to the request, or can be used to perform a denial of service attack on the parsing system, rendering the application content temporarily unavailable. 4. VULNERABLE PACKAGES SAP NetWeaver Portal 7.31 Other versions are probably affected too, but they were not checked. 5. SOLUTIONS AND WORKAROUNDS To correct this vulnerability, install SAP Security Notes 2098608 and 2093966. 6. AUTHOR Vahagn Vardanyan (ERPScan) 7. TECHNICAL DESCRIPTION SAP XML parser (parserXMLValidationComponent) validates all incoming XML requests with a user-specified DTD. 8. REPORT TIMELINE Sent:06.11.2014 Reported: 06.11.2014 Vendor response:07.11.2014 Date of Public Advisory:18.06.2015 9. REFERENCES http://erpscan.com/advisories/erpscan-15-004-sap-netweaver-portal-xmlvalidationcomponent-xxe/ 10. ABOUT ERPScan Research The company’s expertise is based on the research subdivision of ERPScan, which is engaged in vulnerability research and analysis of critical enterprise applications. It has achieved multiple acknowledgments from the largest software vendors like SAP, Oracle, Microsoft, IBM, VMware, HP for discovering more than 400 vulnerabilities in their solutions (200 of them just in SAP!). ERPScan researchers are proud to have exposed new types of vulnerabilities (TOP 10 Web Hacking Techniques 2012) and to be nominated for the best server-side vulnerability at BlackHat 2013. ERPScan experts have been invited to speak, present, and train at 60+ prime international security conferences in 25+ countries across the continents. These include BlackHat, RSA, HITB, and private SAP trainings in several Fortune 2000 companies. ERPScan researchers lead the project EAS-SEC, which is focused on enterprise application security research and awareness. They have published 3 exhaustive annual award-winning surveys about SAP security. ERPScan experts have been interviewed by leading media resources and featured in specialized info-sec publications worldwide. These include Reuters, Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading, Heise, and Chinabyte, to name a few. We have highly qualified experts in staff with experience in many different fields of security, from web applications and mobile/embedded to reverse engineering and ICS/SCADA systems, accumulating their experience to conduct the best SAP security research. 11. ABOUT ERPScan ERPScan is one of the most respected and credible Business Application Security providers. Founded in 2010, the company operates globally. Named an Emerging vendor in Security by CRN and distinguished by more than 25 other awards, ERPScan is the leading SAP SE partner in discovering and resolving security vulnerabilities. ERPScan consultants work with SAP SE in Walldorf to improve the security of their latest solutions. ERPScan’s primary mission is to close the gap between technical and business security. We provide solutions to secure ERP systems and business-critical applications from both cyber attacks and internal fraud. Our clients are usually large enterprises, Fortune 2000 companies, and managed service providers whose requirements are to actively monitor and manage the security of vast SAP landscapes on a global scale. Our flagship product is ERPScan Security Monitoring Suite for SAP. This multi award-winning innovative software is the only solution on the market certified by SAP SE covering all tiers of SAP security: vulnerability assessment, source code review, and Segregation of
[FD] ERPSCAN Research Advisory [ERPSCAN-15-005] SAP Mobile Platform - XXE
ERPSCAN Research Advisory [ERPSCAN-15-005] SAP Mobile Platform - XXE Application:SAP Mobile Platform 2.3 Versions Affected:SAP Mobile Platform 2.3, probably others Vendor URL:http://SAP.com Bugs:XML eXternal Entity Sent:06.11.14 Reported:06.11.14 Vendor response:07.11.14 Date of Public Advisory:18.06.2015 Reference:SAP Security Note 2125358 Author:Dmitry Chastukhin (ERPScan) Description 1. ADVISORY INFORMATION Title: SAP Mobile Platform 2.3 Advisory ID: [ERPSCAN-15-005] Risk: High Advisory URL: http://erpscan.com/advisories/erpscan-15-005-sap-mobile-platform-xxe/ Date published: 15.02.2015 Vendors contacted: SAP 2. VULNERABILITY INFORMATION Class: XML External Entity [CWE-611] Impact: information disclosure, denial of service, read file Remotely Exploitable: Yes Locally Exploitable: No CVE Name: CVE-2015-2813 3. VULNERABILITY DESCRIPTION 1) An attacker can read an arbitrary file on the server by sending a correct XML request with a crafted DTD to/scc/messagebroker/http and reading the reply from the service. 2) An attacker can perform a DoS attack (for example, an XML Entity Expansion attack) 3) A SMB Relay attack is a type of Man-in-the-Middle attack where the attacker asks the victim to authenticate into a machine controlled by the attacker, then relays the credentials to the target. The attacker forwards the authentication information both ways, giving them access. 4. VULNERABLE PACKAGES SAP Mobile Platform 2.2 SAP Mobile Platform 2.3 Other versions are probably affected too, but they were not checked. 5. SOLUTIONS AND WORKAROUNDS To correct this vulnerability, install SAP Security Note 2125358 or: * Upgrade your existing SMP 2.2 installation to SMP 2.2 SP06 PL02 * Upgrade your existing SMP 2.3 installatoin to SMP 2.3 SP05 PL01 6. AUTHOR Dmitry Chastuin (ERPScan) 7. TECHNICAL DESCRIPTION SAP XML parser (/scc/messagebroker/http) validates all incoming XML requests with a user-specified DTD. 8. REPORT TIMELINE Sent:06.11.14 Reported:07.11.14 Vendor response:07.11.14 Date of Public Advisory:18.06.2015 9. REFERENCES http://erpscan.com/advisories/erpscan-15-005-sap-mobile-platform-xxe/ 10. ABOUT ERPScan Research The company’s expertise is based on the research subdivision of ERPScan, which is engaged in vulnerability research and analysis of critical enterprise applications. It has achieved multiple acknowledgments from the largest software vendors like SAP, Oracle, Microsoft, IBM, VMware, HP for discovering more than 400 vulnerabilities in their solutions (200 of them just in SAP!). ERPScan researchers are proud to have exposed new types of vulnerabilities (TOP 10 Web Hacking Techniques 2012) and to be nominated for the best server-side vulnerability at BlackHat 2013. ERPScan experts have been invited to speak, present, and train at 60+ prime international security conferences in 25+ countries across the continents. These include BlackHat, RSA, HITB, and private SAP trainings in several Fortune 2000 companies. ERPScan researchers lead the project EAS-SEC, which is focused on enterprise application security research and awareness. They have published 3 exhaustive annual award-winning surveys about SAP security. ERPScan experts have been interviewed by leading media resources and featured in specialized info-sec publications worldwide. These include Reuters, Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading, Heise, and Chinabyte, to name a few. We have highly qualified experts in staff with experience in many different fields of security, from web applications and mobile/embedded to reverse engineering and ICS/SCADA systems, accumulating their experience to conduct the best SAP security research. 11. ABOUT ERPScan ERPScan is one of the most respected and credible Business Application Security providers. Founded in 2010, the company operates globally. Named an Emerging vendor in Security by CRN and distinguished by more than 25 other awards, ERPScan is the leading SAP SE partner in discovering and resolving security vulnerabilities. ERPScan consultants work with SAP SE in Walldorf to improve the security of their latest solutions. ERPScan’s primary mission is to close the gap between technical and business security. We provide solutions to secure ERP systems and business-critical applications from both cyber attacks and internal fraud. Our clients are usually large enterprises, Fortune 2000 companies, and managed service providers whose requirements are to actively monitor and manage the security of vast SAP landscapes on a global scale. Our flagship product is ERPScan Security Monitoring Suite for SAP. This multi award-winning innovative software is the only solution on the market certified by SAP SE covering all tiers of SAP security: vulnerability
[FD] ERPSCAN Research Advisory [ERPSCAN-15-008] SAP Afaria 7 XcListener - DoS in the module XeClient.Dll
https://www.linkedin.com/company/2217474?trk=ppro_cprofERPSCAN Research Advisory [ERPSCAN-15-008] SAP Afaria 7 XcListener - DoS in the module XeClient.Dll Application:SAP Afaria 7 Versions Affected:SAP Afaria 7, probably others Vendor URL:http://SAP.com Bugs:DoS Sent:09.12.2014 Reported:09.12.2014 Vendor response:10.12.2014 Date of Public Advisory:18.06.2015 Reference:SAP Security Note 2132584 Author:Vahagn Vardanyan (ERPScan) Description 1. ADVISORY INFORMATION Title: SAP Afaria 7 XcListener - DoS Advisory ID: [ERPSCAN-15-008] Risk: High Advisory URL: http://erpscan.com/advisories/erpscan-15-008-sap-afaria-7-xclistener-buffer-overflow Date published: 15.03.2015 Vendors contacted: SAP 2. VULNERABILITY INFORMATION Class: DoS [CWE-400] Impact: DoS Remotely Exploitable: Yes Locally Exploitable: No CVE Name: CVE-2015-2820 3. VULNERABILITY DESCRIPTION It is possible to use denial of service to terminate the process of the vulnerable component. As a result, nobody can use this service, which has a negative influence on business processes. System downtime also harms business reputation. 4. VULNERABLE PACKAGES SAP Afaria 7 Other versions are probably affected too, but they were not checked. 5. SOLUTIONS AND WORKAROUNDS A vulnerability has been discovered in certain landscape configurations of SAP Afaria that utilize XcListener for initiating client-to-server communications. SAP has released security patches for the vulnerable clients, Windows Mobile, Windows CE, and Windows. Windows Phone is not affected. SAP strongly recommends that customers patch their servers. Patching instructions: 1) Download hotfix 1. SAP Afaria 7 SP5 Hotfix 8 2. SAP Afaria 7 SP4 Hotfix 16 2) Apply server hotfix The server version of XcListener will be patched when the hotfix is applied. The clients will be updated through the Afaria ESD process as they connect to the server. 6. AUTHOR Vahagn Vardanyan (ERPScan) 7. TECHNICAL DESCRIPTION An anonymous attacker can use a special request to crash the XcListener process on the server. 8. REPORT TIMELINE Sent:09.12.2014 Reported: 09.12.2014 Vendor response:10.12.2014 Date of Public Advisory:18.06.2015 9. REFERENCES http://erpscan.com/advisories/erpscan-15-008-sap-afaria-7-xclistener-buffer-overflow 10. ABOUT ERPScan Research The company’s expertise is based on the research subdivision of ERPScan, which is engaged in vulnerability research and analysis of critical enterprise applications. It has achieved multiple acknowledgments from the largest software vendors like SAP, Oracle, Microsoft, IBM, VMware, HP for discovering more than 400 vulnerabilities in their solutions (200 of them just in SAP!). ERPScan researchers are proud to have exposed new types of vulnerabilities (TOP 10 Web Hacking Techniques 2012) and to be nominated for the best server-side vulnerability at BlackHat 2013. ERPScan experts have been invited to speak, present, and train at 60+ prime international security conferences in 25+ countries across the continents. These include BlackHat, RSA, HITB, and private SAP trainings in several Fortune 2000 companies. ERPScan researchers lead the project EAS-SEC, which is focused on enterprise application security research and awareness. They have published 3 exhaustive annual award-winning surveys about SAP security. ERPScan experts have been interviewed by leading media resources and featured in specialized info-sec publications worldwide. These include Reuters, Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading, Heise, and Chinabyte, to name a few. We have highly qualified experts in staff with experience in many different fields of security, from web applications and mobile/embedded to reverse engineering and ICS/SCADA systems, accumulating their experience to conduct the best SAP security research. 11. ABOUT ERPScan ERPScan is one of the most respected and credible Business Application Security providers. Founded in 2010, the company operates globally. Named an Emerging vendor in Security by CRN and distinguished by more than 25 other awards, ERPScan is the leading SAP SE partner in discovering and resolving security vulnerabilities. ERPScan consultants work with SAP SE in Walldorf to improve the security of their latest solutions. ERPScan’s primary mission is to close the gap between technical and business security. We provide solutions to secure ERP systems and business-critical applications from both cyber attacks and internal fraud. Our clients are usually large enterprises, Fortune 2000 companies, and managed service providers whose requirements are to actively monitor and manage the security of vast SAP landscapes on a global scale. Our flagship product is ERPScan Security Monitoring Suite
[FD] ERPSCAN Research Advisory [ERPSCAN-15-011] SAP Mobile Platform 3.0 - XXE
ERPSCAN Research Advisory [ERPSCAN-15-011] SAP Mobile Platform 3.0 - XXE Application:SAP Mobile Platform 3.0 Versions Affected:SAP Mobile Platform 3.0, probably others Vendor URL:http://SAP.com Bugs:XML eXternal Entity Sent:29.12.2014 Reported: 29.12.2014 Vendor response:30.12.2014 Date of Public Advisory:18.06.2015 Reference:SAP Security Note 2125513 Author:Vahagn Vardanyan (ERPScan) Description 1. ADVISORY INFORMATION Title: SAP Mobile Platform 3.0 XXE Advisory ID: [ERPSCAN-15-011] Risk: High Advisory URL: http://erpscan.com/advisories/erpscan-15-011-sap-mobile-platform-xxe/ Date published: 15.03.2015 Vendors contacted: SAP 2. VULNERABILITY INFORMATION Class: XML External Entity [CWE-611] Impact: XML external entity, information disclosure, denial of service Remotely Exploitable: Yes Locally Exploitable: No 3. VULNERABILITY DESCRIPTION The problem is caused by a program error in SAP Mobile Platform 3.0 due to the incorrect use of an XML parser (/mobiliser servlet). By default, the parser opens external entities referenced within an XML input, which can then lead to malicious content being parsed. This malicious content can reference internal resources, such as files. These internal resources can be disclosed in the response to the request, or can be used to perform a denial of service attack on the parsing system, rendering the application content temporarily unavailable. 4. VULNERABLE PACKAGES SAP Mobile Platform 3.0 Other versions are probably affected too, but they were not checked. 5. SOLUTIONS AND WORKAROUNDS To correct this vulnerability, install SAP Security Note 2125513. 6. AUTHOR Vahagn Vardanyan (ERPScan) 7. TECHNICAL DESCRIPTION SAP XML parser validates all incoming XML requests with a user-specified DTD. 8. REPORT TIMELINE Sent:29.12.2014 Reported:29.12.2014 Vendor response:30.12.2014 Date of Public Advisory:18.06.2015 9. REFERENCES http://erpscan.com/advisories/erpscan-15-011-sap-mobile-platform-xxe/ 10. ABOUT ERPScan Research The company’s expertise is based on the research subdivision of ERPScan, which is engaged in vulnerability research and analysis of critical enterprise applications. It has achieved multiple acknowledgments from the largest software vendors like SAP, Oracle, Microsoft, IBM, VMware, HP for discovering more than 400 vulnerabilities in their solutions (200 of them just in SAP!). ERPScan researchers are proud to have exposed new types of vulnerabilities (TOP 10 Web Hacking Techniques 2012) and to be nominated for the best server-side vulnerability at BlackHat 2013. ERPScan experts have been invited to speak, present, and train at 60+ prime international security conferences in 25+ countries across the continents. These include BlackHat, RSA, HITB, and private SAP trainings in several Fortune 2000 companies. ERPScan researchers lead the project EAS-SEC, which is focused on enterprise application security research and awareness. They have published 3 exhaustive annual award-winning surveys about SAP security. ERPScan experts have been interviewed by leading media resources and featured in specialized info-sec publications worldwide. These include Reuters, Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading, Heise, and Chinabyte, to name a few. We have highly qualified experts in staff with experience in many different fields of security, from web applications and mobile/embedded to reverse engineering and ICS/SCADA systems, accumulating their experience to conduct the best SAP security research. 11. ABOUT ERPScan ERPScan is one of the most respected and credible Business Application Security providers. Founded in 2010, the company operates globally. Named an Emerging vendor in Security by CRN and distinguished by more than 25 other awards, ERPScan is the leading SAP SE partner in discovering and resolving security vulnerabilities. ERPScan consultants work with SAP SE in Walldorf to improve the security of their latest solutions. ERPScan’s primary mission is to close the gap between technical and business security. We provide solutions to secure ERP systems and business-critical applications from both cyber attacks and internal fraud. Our clients are usually large enterprises, Fortune 2000 companies, and managed service providers whose requirements are to actively monitor and manage the security of vast SAP landscapes on a global scale. Our flagship product is ERPScan Security Monitoring Suite for SAP. This multi award-winning innovative software is the only solution on the market certified by SAP SE covering all tiers of SAP security: vulnerability assessment, source code review, and Segregation of Duties. The largest companies from diverse industries like oil and gas, banking, retail, even nuclear power
[FD] ERPSCAN Research Advisory [ERPSCAN-15-010] SYBASE SQL Anywhere 12 and 16 - DoS
ERPSCAN Research Advisory [ERPSCAN-15-010] SYBASE SQL Anywhere 12 and 16 - DoS Application:SYBASE SQL Anywhere 12 and 16 Versions Affected:SYBASE SQL Anywhere 12 and 16, probably others Vendor URL:http://SAP.com Bugs:DoS Sent:09.12.2014 Reported: 09.12.2014 Vendor response:10.12.2014 Date of Public Advisory:18.06.2015 Reference: SAP Security Note 2108161 Author: Vahagn Vardanyan (ERPScan) Description 1. ADVISORY INFORMATION Title: SYBASE SQL Anywhere 12 and 16 - DoS Advisory ID: [ERPSCAN-15-010] Risk: High Advisory URL: http://erpscan.com/advisories/erpscan-15-010-sybase-sql-anywhere-11-and-16-dos/ Date published: 15.03.2015 Vendors contacted: SAP 2. VULNERABILITY INFORMATION Class: DoS [CWE-122] Impact: DoS Remotely Exploitable: Yes Locally Exploitable: No CVE Name: CVE-2015-2819 3. VULNERABILITY DESCRIPTION An attacker can trigger a condition in which the process ceases to run. This condition can be intentionally provoked by an attacker to cause denial of service. 4. VULNERABLE PACKAGES SYBASE SQL Anywhere 12 and 16 Other versions are probably affected too, but they were not checked. 5. SOLUTIONS AND WORKAROUNDS To correct this vulnerability, install SAP Security Note 2108161. 6. AUTHOR Vahagn Vardanyan (ERPScan) 7. TECHNICAL DESCRIPTION An anonymous attacker can use a special request to crash the Sybase SQL Anywhere process on the server. 8. REPORT TIMELINE Sent:09.12.2014 Reported: 09.12.2014 Vendor response:10.12.2014 Date of Public Advisory:18.06.2015 9. REFERENCES http://erpscan.com/advisories/erpscan-15-010-sybase-sql-anywhere-11-and-16-dos/ 10. ABOUT ERPScan Research The company’s expertise is based on the research subdivision of ERPScan, which is engaged in vulnerability research and analysis of critical enterprise applications. It has achieved multiple acknowledgments from the largest software vendors like SAP, Oracle, Microsoft, IBM, VMware, HP for discovering more than 400 vulnerabilities in their solutions (200 of them just in SAP!). ERPScan researchers are proud to have exposed new types of vulnerabilities (TOP 10 Web Hacking Techniques 2012) and to be nominated for the best server-side vulnerability at BlackHat 2013. ERPScan experts have been invited to speak, present, and train at 60+ prime international security conferences in 25+ countries across the continents. These include BlackHat, RSA, HITB, and private SAP trainings in several Fortune 2000 companies. ERPScan researchers lead the project EAS-SEC, which is focused on enterprise application security research and awareness. They have published 3 exhaustive annual award-winning surveys about SAP security. ERPScan experts have been interviewed by leading media resources and featured in specialized info-sec publications worldwide. These include Reuters, Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading, Heise, and Chinabyte, to name a few. We have highly qualified experts in staff with experience in many different fields of security, from web applications and mobile/embedded to reverse engineering and ICS/SCADA systems, accumulating their experience to conduct the best SAP security research. 11. ABOUT ERPScan ERPScan is one of the most respected and credible Business Application Security providers. Founded in 2010, the company operates globally. Named an Emerging vendor in Security by CRN and distinguished by more than 25 other awards, ERPScan is the leading SAP SE partner in discovering and resolving security vulnerabilities. ERPScan consultants work with SAP SE in Walldorf to improve the security of their latest solutions. ERPScan’s primary mission is to close the gap between technical and business security. We provide solutions to secure ERP systems and business-critical applications from both cyber attacks and internal fraud. Our clients are usually large enterprises, Fortune 2000 companies, and managed service providers whose requirements are to actively monitor and manage the security of vast SAP landscapes on a global scale. Our flagship product is ERPScan Security Monitoring Suite for SAP. This multi award-winning innovative software is the only solution on the market certified by SAP SE covering all tiers of SAP security: vulnerability assessment, source code review, and Segregation of Duties. The largest companies from diverse industries like oil and gas, banking, retail, even nuclear power installations as well as consulting companies have successfully deployed the software. ERPScan Security Monitoring Suite for SAP is specifically designed for enterprises to continuously monitor changes in multiple SAP systems. It generates and analyzes trends in user friendly dashboards, manages risks, tasks, and can export results to external
[FD] SAP Security Notes May 2015
server and client SAP applications use the vulnerable compression
algorithm LZC/LZH:
* SAP NetWeaver Application Server ABAP
* SAP NetWeaver Application Server Java
* SAP NetWeaver RFC SDK
* SAP RFC SDK
* SAP GUI
* SAP MaxDB database
* SAPCAR archive tool
They are also used in the following protocols:
* Diag
* RFC
* MaxDB
Let’s look at the found vulnerabilities in detail.
*1. Stack-based overflow vulnerability CVE-2015-2282 in compression
algorithm LZC*
Vulnerable application code:
|/[..]/
int CsObjectInt::CsDecomprLZC (SAP_BYTE * inbuf,
SAP_INT inlen,
SAP_BYTE * outbuf,
SAP_INT outlen,
SAP_INT option,
SAP_INT * bytes_read,
SAP_INT * bytes_written)
[..]
/* Generate output characters in reverse order ...*/
while (code = 256)
{
*stackp++ = TAB_SUFFIXOF(code);
overflow
code = TAB_PREFIXOF(code);
}
[..]|
Note that the variable code contains an attacker-controlled value,
which results in a stack overflow if the value is greater than 256 and
the value of the code in the prefix table is also greater than 256. It's
possible to fill the stack with arbitrary values by controlling the
values stored in the prefix and suffix tables.
*2. Vulnerability CVE-2015-2278 in compression algorithm LZH*
Using this vulnerability, an attacker can read data stored outside the
buffer using special package data.
Vulnerable code:
|/[..]/
int CsObjectInt::BuildHufTree (
unsigned * b, /* code lengths in bits (all assumed = BMAX) */
unsigned n, /* number of codes (assumed = N_MAX) */
unsigned s, /* number of simple-valued codes (0..s-1) */
int * d, /* list of base values for non-simple codes */
int * e, /* list of extra bits for non-simple codes */
HUFTREE **t, /* result: starting table */
int * m) /* maximum lookup bits, returns actual */
[..]
if (p = v + n)
{
r.e = INVALIDCODE; /* out of values--invalid code */
}
else if (*p s)
{ /* 256 is end-of-block code */
r.e = (unsigned char)(*p 256 ? LITCODE : EOBCODE);
r.v.n = (unsigned short) *p; /* simple code is just the value*/
p++;
}
else
{
r.e = (unsigned char) e[*p - s]; /*non-simple,look up in lists*/
r.v.n = (unsigned short) d[*p - s];
p++;
}
[..]|
As you can see, arrays 'e' and 'd' are indexed by the values of * p -
s. As the value of variables 'p' and 's' are under the attacker’s
control, they also control the values of arrays 'e' and 'd'.
*Attack scenarios*
As the vulnerability affects a large number of SAP products, there are
multiple attack vectors depending on how the vulnerable code is used in
an SAP program.
Examples of vectors:
* Attack on a server component: SAP NetWeaver services Gateway and
Dispatcher process compressed data. An attacker can forge requests,
create a special attack package, and exploit a Remote Code Execution
vulnerability on the server.
* Attack on a client component: the attacker can create a special .CAR
or .SAR package, send it to a client, and when they try to unarchive
it, the attacker’s commands will be executed on the client's host.
* MitM attack. As most of the services affected by these issues are
not encrypted by default, an attacker might be able to perform a
man-in-the-middle attack and trigger the vulnerabilities by
injecting malicious packets within the communication.
*Remediation*
SAP customers can implement security notes 2124806, 2121661, 2127995,
2125316 at the company's support portal.
SAP has traditionally issued acknowledgments to the security researchers
on theirwebsite http://scn.sap.com/docs/DOC-8218.
--
Darya Maenkova
PR manager
https://www.linkedin.com/company/2217474?trk=ppro_cprof
https://twitter.com/erpscan
http://erpscan.com/
e-mail: d.maenk...@erpscan.com mailto:d.maenk...@erpscan.com
address: 228 Hamilton Avenue, Fl. 3, Palo Alto, CA. 94301
phone: 650.798.5255
erpscan.com http://erpscan.com
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[FD] SAP vulnerabilities highlighted in many reports such as HP Cyber Risk Report 2015
Recently, HP published their yearly Cyber Risk Report 2015 (http://info.hpenterprisesecurity.com/LP_460192_Cross_CyberriskFullReport_0315_gate ). Having many typical things spotlighted in this report such as growing number of ATM and IOT Security buzz you can find everywhere, ERPScan found some parts which are relevant to business application security. We have prepared deep article from this research, add all details and also collected information from different sources about growing number of SAP vulnerabilities and recent initiatives in helping SAP users to avoid issues (new security guidelines). http://erpscan.com/press-center/blog/sap-vulnerabilities-highlighted-in-many-reports-such-as-hp-cyber-risk-report-2015/#more-7858 -- Darya Maenkova PR manager https://www.linkedin.com/profile/public-profile-settings?trk=prof-edit-edit-public_profile https://twitter.com/d_maenkova http://erpscan.com/ e-mail: d.maenk...@erpscan.com mailto:d.maenk...@erpscan.com address: 228 Hamilton Avenue, Fl. 3, Palo Alto, CA. 94301 phone: 650.798.5255 erpscan.com http://erpscan.com ___ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives RSS: http://seclists.org/fulldisclosure/
