Security Advisory 2017-09: Security Update for OTRS Framework

 

December 05, 2017 — Please read carefully and check if the version of your OTRS system is affected by this vulnerability.

Please send information regarding vulnerabilities in OTRS to: security@otrs.org

PGP Key

  • pub 2048R/9C227C6B 2011-03-21 [expires at: 2020-11-16]
  • uid OTRS Security Team <security@otrs.org>
  • GPG Fingerprint E330 4608 DA6E 34B7 1551 C244 7F9E 44E9 9C22 7C6B

Security Advisory Details

 

  • ID: OSA-2017-09
  • Date: 2017-12-05
  • Title: Remote code execution
  • Severity: 8.1 high
  • Product: OTRS 6.0.x, OTRS 5.0.x, OTRS 4.0.x
  • Fixed in: OTRS 6.0.2, OTRS 5.0.25, OTRS 4.0.27
  • URL:
  • FULL CVSS v3 VECTOR: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
  • References: CVE-2017-16921

 

Vulnerability Description

 

This advisory covers vulnerabilities discovered in the OTRS framework.

 

Privilege Escalation

 

An attacker who is logged into OTRS as an agent can manipulate form parameters and execute arbitrary shell commands with the permissions of the OTRS or web server user.

 

Affected by this vulnerability are all releases of OTRS 6.0.x up to and including 6.0.1, OTRS 5.0.x up to and including 5.0.24 and OTRS 4.0.x up to and including 4.0.26.

This vulnerability is fixed in the latest versions of OTRS, and it is recommended to upgrade to the latest patch level.

Fixed releases can be found at:

https://www.otrs.com/category/release-and-security-notes-en/

Detailed information about the changes:

OTRS 6

https://github.com/OTRS/otrs/commit/d12797bf1efa6722c2ba9af6d8238446c2903cd1

OTRS 5

https://github.com/OTRS/otrs/commit/d433518d7bd8e9e079af67ef9ea7079cd2f59646

OTRS 4

https://github.com/OTRS/otrs/commit/368bc37f137e6344f4db014ee2e03c38e2fc62d2
https://github.com/OTRS/otrs/commit/4043ebb2580cd8f87e7758e95bf0d77eea5c82ae

However, to avoid unwanted side effects, we recommend a complete update.

Thanks to Francesco Sirocco for discovering and reporting this issue.