September 29, 2015 — 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: firstname.lastname@example.org
Security Advisory Details
- IID: OSA-2015-02
- Date: 2015-09-17
- Title: Scheduler Process ID File Access
- Severity: 1.2
- Product: OTRS 3.2.x, 3.3.x, 4.0.x
- Fixed in: OTRS 3.2.18, 3.3.15, 4.0.13
- FULL CVSS v2 VECTOR: (AV:L/AC:M/AU:S/C:N/I:P/A:N/E:U/RL:OF/RC:C/CDP:ND/TD:ND/CR:ND/IR:ND/AR:ND)
- References: CVE-2015-6842, CVE-2013-7135
This advisory covers vulnerabilities discovered in the OTRS core system.
Scheduler Process ID File Access
- An attacker with valid LOCAL credentials could access and manipulate the process ID file for bin/otrs.schduler.pl from the CLI.
- The Proc::Daemon module 0.14 for Perl uses world-writable permissions for a file that stores a process ID, which allows local users to have an unspecified impact by modifying this file.
Affected by this vulnerability are all releases of 3.2.x up to and including 3.2.17, 3.3.x up to and including 3.3.14 and 4.0.x up to and including 4.0.12.
This vulnerability is fixed in the latest versions of OTRS and the affected packages, and it is recommended to upgrade to one of these.
Fixed releases can be found at:
Here are detailed informations about the required changes:
- 4: https://github.com/OTRS/otrs/commit/e352c8b146e4d147e11d87a30f054c54ab187ab2
- 3.3: https://github.com/OTRS/otrs/commit/fb2feca6634f9b8fa6890e68d65b8bad1030aae7
- 3.2: https://github.com/OTRS/otrs/commit/65ff70d09f228126119f1b207c71046c00f2578f
However, to avoid unwanted side effects, we recommend a complete update.
Thanks to Thorsten Eckel (znuny) for discovering and reporting this issue.