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
Security Advisory Details
- ID: OSA-2017-08
- Date: 2017-12-05
- Title: Information Disclosure
- Severity: 5.1 Medium
- 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:U/C:H/I:N/A:N/E:P/RL:O/RC:C
- References: CVE-2017-16854
Vulnerability Description
This advisory covers vulnerabilities discovered in the OTRS framework.
Privilege Escalation
An attacker who is logged into OTRS as a customer can use the ticket search form to disclose internal article information of their customer tickets.
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, OTRS 4.0.x up to and including 4.0.26 and OTRS 3.3.x up to and including 3.3.20.
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://community.otrs.com/category/release-and-security-notes-en/
Detailed information about the changes:
OTRS 6.0
https://github.com/OTRS/otrs/commit/867aba14900f17caacb0285a08b6981bbdbbe016
OTRS 5.0
https://github.com/OTRS/otrs/commit/8748d040058695fda5c9cfcb2a78d8947ed4188d
OTRS 4.0
https://github.com/OTRS/otrs/commit/e0deab303e3d0f7c860bba291410512734f4d6b0
However, to avoid unwanted side effects, we recommend a complete update.
Thanks to medDV and Christian Mazzotta for discovering and reporting this issue.