CVE-2012-6706
Publication date 22 June 2017
Last updated 25 August 2025
Ubuntu priority
Description
A VMSF_DELTA memory corruption was discovered in unrar before 5.5.5, as used in Sophos Anti-Virus Threat Detection Engine before 3.37.2 and other products, that can lead to arbitrary code execution. An integer overflow can be caused in DataSize+CurChannel. The result is a negative value of the "DestPos" variable, which allows the attacker to write out of bounds when setting Mem[DestPos].
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libclamunrar | ||
| 18.04 LTS bionic |
Fixed 0.99-4ubuntu1
|
|
| 16.04 LTS xenial |
Fixed 0.99-1ubuntu0.1
|
|
| 14.04 LTS trusty |
Fixed 0.99-0ubuntu0.14.04.2
|
|
| unrar-nonfree | ||
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Fixed 1:5.3.2-1+deb9u1build0.16.04.1
|
|
| 14.04 LTS trusty | Not in release |
Severity score breakdown
CVSS version: CVSS v3.0
Base score
9.8 · Critical
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
Other references
- http://www.openwall.com/lists/oss-security/2017/06/21/9
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1286&desc=6
- http://securitytracker.com/id?1027725
- http://telussecuritylabs.com/threats/show/TSL20121207-01
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1286
- https://community.sophos.com/kb/en-us/118424#six
- https://lock.cmpxchg8b.com/sophailv2.pdf
- https://nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/
- https://www.cve.org/CVERecord?id=CVE-2012-6706