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CERT advisory: Multiple vulnerabilities in Oracle Servers ------------------------------------------------------------------------ SUMMARY Multiple vulnerabilities in Oracle Application Server have recently been discovered. These vulnerabilities include buffer overflows, insecure default settings, failures to enforce access controls, and failure to validate input. The impacts of these vulnerabilities include the execution of arbitrary commands or code, denial of service, and unauthorized access to sensitive information. DETAILS Vulnerable systems: Systems running Oracle8i Database Systems running Oracle9i Database Systems running Oracle9i Application Server Oracle Application Server includes a web server based on the Apache HTTP Server. Oracle extends the web server with a number of different components that can be used provide interfaces to database applications. These components include, but are not limited to, a Procedural Language/Structured Query Language (PL/SQL) module, Java Server Pages, XSQL Servlets, and Simple Object Access Protocol (SOAP) applications. The vulnerabilities referenced in this advisory were reported in several publications by David Litchfield of NGSSoftware: * Hackproofing Oracle Application Server <http://www.nextgenss.com/papers/hpoas.pdf> http://www.nextgenss.com/papers/hpoas.pdf * NGSSoftware Insight Security Research Advisory #NISR20122001 <http://www.nextgenss.com/advisories/plsql.txt> http://www.nextgenss.com/advisories/plsql.txt * NGSSoftware Insight Security Research Advisory #NISR06022002A <http://www.nextgenss.com/advisories/oraplsextproc.txt> http://www.nextgenss.com/advisories/oraplsextproc.txt * NGSSOftware Insight Security Research Advisory #NISR06022002B <http://www.nextgenss.com/advisories/oraplsbos.txt> http://www.nextgenss.com/advisories/oraplsbos.txt * NGSSoftware Insight Security Research Advisory #NISR06022002C <http://www.nextgenss.com/advisories/orajsa.txt> http://www.nextgenss.com/advisories/orajsa.txt <http://www.nextgenss.com/advisories/orajsp.txt> http://www.nextgenss.com/advisories/orajsp.txt For the complete list of Oracle-related vulnerabilities published by the CERT/CC, please search the Vulnerability Notes Database using the term 'Oracle'. Details about specific vulnerabilies can be found in the appropriate vulnerability note. Oracle has addressed these vulnerabilities with patches and recommended configuration changes. For more information please see the vendor information section. Buffer overflows Several buffer-overflow vulnerabilities exist in the way the PL/SQL module handles HTTP requests and configuration parameters. Default configuration settings in a range of components are insecure, and different components fail to apply access restrictions uniformly. These vulnerabilities expose both the systems running Oracle Application Server and the information held in the underlying databases to undue risk. Two more buffer overflow vulnerabilities exist in code that processes configuration parameters. These parameters processes configuration parameters that can be specified via the PL/SQL gateway web administration interface. By default, access to the PL/SQL gateway web administration interface is not restricted [VU#611776]. VU#500203 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via help page request VU#313280 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via HTTP Location header VU#750299 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via HTTP request VU#878603 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via HTTP Authorization header VU#659043 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via Database Access Descriptor password VU#923395 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via cache directory name Insecure default configurations The default installation of Oracle Application Server includes a number of insecure configuration settings, such as well-known default passwords and unrestricted access to applications and sensitive information. VU#307835 - Oracle9i Application Server OWA_UTIL procedures expose sensitive information VU#736923 - Oracle 9iAS SOAP components allow anonymous users to deploy applications by default VU#611776 - Oracle9i Application Server PL/SQL Gateway web administration interface uses null authentication by default VU#698467 - Oracle 9iAS default configuration allows access to "globals.jsa" file VU#476619 - Oracle 9iAS default configuration allows arbitrary users to view sensitive configuration files VU#712723 - Oracle 9iAS default configuration uses well-known default passwords VU#168795 - Oracle 9iAS allows anonymous remote users to view sensitive Apache services by default VU#278971 - Oracle 9i Application Server does not adequately handle requests for nonexistent JSP files thereby disclosing web folder path information Failure to enforce access controls Oracle Application Server does not uniformly enforce access restrictions. Different components do not adequately check authorization before granting access to protected resources. VU#180147 - Oracle 9i Database Server PL/SQL module allows remote command execution without authentication VU#193523 - Oracle 9i Application Server allows unauthenticated access to PL/SQL applications via alternate Database Access Descriptor VU#977251 - Oracle 9iAS XSQL Servlet ignores file permissions allowing arbitrary users to view sensitive configuration files VU#547459 - Oracle 9iAS creates temporary files when processing JSP requests that are world-readable Failure to validate input In one case, the PL/SQL module does not properly handle a malformed HTTP request. VU#805915 - Oracle9i Application Server Apache PL/SQL module does not properly handle HTTP Authorization header Impact The impacts of these vulnerabilities include the remote execution of arbitrary code, remote execution of commands and SQL queries, disclosure of sensitive information, and denial of service. Remote execution of arbitrary commands and code This section contains vulnerabilities that permit a remote intruder to cause a denial of service or execute arbitrary commands, code, or queries on the system. Some of these vulnerabilities allow execution with the privileges of the Apache process. On UNIX systems, the Apache process typically runs as the "oracle" user. On Windows systems, the Apache service typically runs as the SYSTEM user; therefore, an attacker could gain complete control of the system by exploiting these vulnerabilities. VU#500203 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via help page request VU#313280 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via help page request Location: header VU#750299 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via HTTP request VU#878603 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via HTTP Authorization header password parameter VU#659043 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via Database Access Descriptor password VU#923395 - Oracle9i Application Server Apache PL/SQL module vulnerable to buffer overflow via cache directory name VU#180147 - Oracle 9i Database Server PL/SQL module allows remote command execution without authentication VU#736923 - Oracle 9iAS SOAP components allow anonymous users to deploy applications by default VU#712723 - Oracle 9iAS default configuration uses well-known default passwords VU#611776 - Oracle9i Application Server PL/SQL Gateway web administration interface uses null authentication by default Unauthorized access to sensitive information A number of vulnerabilities disclose configuration information or expose data stored in underlying databases. Also, insecure applications could allow an intruder to execute SQL queries. Oracle system programmers may wish to examine these vulnerabilities in Oracle's sample pages to prevent similar vulnerabilities in their own Oracle applications. VU#307835 - Oracle9i Application Server OWA_UTIL PL/SQL application exposes procedures that are remotely accessible by arbitrary users VU#193523 - Oracle 9i Application Server allows unauthenticated access to PL/SQL applications via alternate Database Access Descriptor VU#698467 - Oracle 9iAS default configuration allows access to "globals.jsa" file VU#476619 - Oracle 9iAS default configuration allows arbitrary users to view sensitive configuration files VU#977251 - Oracle 9iAS XSQL Servlet ignores file permissions allowing arbitrary users to view sensitive configuration files VU#168795 - Oracle 9iAS allows anonymous remote users to view sensitive Apache services by default VU#278971 - Oracle 9i Application Server does not adequately handle requests for nonexistent JSP files thereby disclosing web folder path information VU#547459 - Oracle 9iAS creates temporary files when processing JSP requests that are world-readable Denial of service In the case where the PL/SQL module does not properly handle an HTTP request, a denial-of-service vulnerability exists. Also, an unsuccessful attempt to exploit a buffer overflow vulnerability could crash the Apache service. VU#805915 - Oracle9i Application Server Apache PL/SQL module does not properly handle HTTP Authorization header Solution Oracle has provided patches and workarounds that address most of these vulnerabilities. Sites using Oracle Application Server are encouraged to install the appropriate patches and make the recommended configuration changes provided by Oracle. Solutions and workarounds for specific vulnerabilities can be found in individual vulnerability notes and in the following Oracle security alerts: * Oracle Security Alert #29 <http://otn.oracle.com/deploy/security/pdf/plsextproc_alert.pdf> http://otn.oracle.com/deploy/security/pdf/plsextproc_alert.pdf * Oracle Security Alert #28 <http://otn.oracle.com/deploy/security/pdf/ias_modplsql_alert.pdf> http://otn.oracle.com/deploy/security/pdf/ias_modplsql_alert.pdf * Oracle Security Alert #25 <http://otn.oracle.com/deploy/security/pdf/modplsql.pdf> http://otn.oracle.com/deploy/security/pdf/modplsql.pdf * Oracle Security Alert #22 <http://otn.oracle.com/deploy/security/pdf/ias_soap_alert.pdf> http://otn.oracle.com/deploy/security/pdf/ias_soap_alert.pdf Security and patch information for Oracle products are available at the following locations: * Oracle Security Alerts <http://otn.oracle.com/deploy/security/alerts.htm> http://otn.oracle.com/deploy/security/alerts.htm * MetaLink (registration required) <http://metalink.oracle.com/> http://metalink.oracle.com/ Sites using Oracle Application Server may also find David Litchfield's Hackproofing Oracle Application Server paper useful in describing the impacts and various interactions of these vulnerabilities. Apply a patch Oracle has released patches that address some of these vulnerabilities. Patch information can be found in Oracle Security Alert #28 and Oracle Security Alert #25 and on the MetaLink web site (registration required). Secure default configuration Oracle has provided documentation on changing vulnerable default configuration settings. For details, consult individual Vulnerability Notes and the Oracle Security Alerts referenced in the additional information section. ADDITIONAL INFORMATION The CERT Coordination Center thanks David Litchfield and Oracle for information used in this document. Authors: Art Manion, Jason Rafail, and Shawn Van Ittersum References 1. <http://www.kb.cert.org/vuls/id/500203> http://www.kb.cert.org/vuls/id/500203 2. <http://www.kb.cert.org/vuls/id/313280> http://www.kb.cert.org/vuls/id/313280 3. <http://www.kb.cert.org/vuls/id/750299> http://www.kb.cert.org/vuls/id/750299 4. <http://www.kb.cert.org/vuls/id/878603> http://www.kb.cert.org/vuls/id/878603 5. <http://www.kb.cert.org/vuls/id/659043> http://www.kb.cert.org/vuls/id/659043 6. <http://www.kb.cert.org/vuls/id/923395> http://www.kb.cert.org/vuls/id/923395 7. <http://www.kb.cert.org/vuls/id/307835> http://www.kb.cert.org/vuls/id/307835 8. <http://www.kb.cert.org/vuls/id/736923> http://www.kb.cert.org/vuls/id/736923 9. <http://www.kb.cert.org/vuls/id/611776> http://www.kb.cert.org/vuls/id/611776 10. <http://www.kb.cert.org/vuls/id/698467> http://www.kb.cert.org/vuls/id/698467 11. <http://www.kb.cert.org/vuls/id/476619> http://www.kb.cert.org/vuls/id/476619 12. <http://www.kb.cert.org/vuls/id/712723> http://www.kb.cert.org/vuls/id/712723 13. <http://www.kb.cert.org/vuls/id/168795> http://www.kb.cert.org/vuls/id/168795 14. <http://www.kb.cert.org/vuls/id/278971> http://www.kb.cert.org/vuls/id/278971 15. <http://www.kb.cert.org/vuls/id/180147> http://www.kb.cert.org/vuls/id/180147 16. <http://www.kb.cert.org/vuls/id/193523> http://www.kb.cert.org/vuls/id/193523 17. <http://www.kb.cert.org/vuls/id/977251> http://www.kb.cert.org/vuls/id/977251 18. <http://www.kb.cert.org/vuls/id/805915> http://www.kb.cert.org/vuls/id/805915 19. <http://www.kb.cert.org/vuls/id/547459> http://www.kb.cert.org/vuls/id/547459 20. <http://www.nextgenss.com/papers/hpoas.pdf> http://www.nextgenss.com/papers/hpoas.pdf 21. <http://www.nextgenss.com/advisories/plsql.txt> http://www.nextgenss.com/advisories/plsql.txt 22. <http://www.nextgenss.com/advisories/oraplsextproc.txt> http://www.nextgenss.com/advisories/oraplsextproc.txt 23. <http://www.nextgenss.com/advisories/oraplsbos.txt> http://www.nextgenss.com/advisories/oraplsbos.txt 24. <http://www.nextgenss.com/advisories/orajsa.txt> http://www.nextgenss.com/advisories/orajsa.txt 25. <http://www.nextgenss.com/advisories/orajsp.txt> http://www.nextgenss.com/advisories/orajsp.txt 26. <http://otn.oracle.com/deploy/security/pdf/plsextproc_alert.pdf> http://otn.oracle.com/deploy/security/pdf/plsextproc_alert.pdf 27. <http://otn.oracle.com/deploy/security/pdf/ias_modplsql_alert.pdf> http://otn.oracle.com/deploy/security/pdf/ias_modplsql_alert.pdf 28. <http://otn.oracle.com/deploy/security/pdf/modplsql.pdf> http://otn.oracle.com/deploy/security/pdf/modplsql.pdf 29. <http://otn.oracle.com/deploy/security/pdf/ias_soap_alert.pdf> http://otn.oracle.com/deploy/security/pdf/ias_soap_alert.pdf ======================================== This bulletin is sent to members of the SecuriTeam mailing list. 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