CVE-2012-6706

critical

Published 2017-06-22 · Modified 2026-05-13

CVSS v3

9.8

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2

10.0

VIR risk

9.8

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].

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2012-6706

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://community.sophos.com/kb/en-us/118424#six

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201803-14

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2012-6706.html

OS impact

OS	Version	Status	Fixed in
sles		affected
arch		fixed	`1:5.5.5-1`
debian	bookworm	fixed	`0.99-4`
debian	bullseye	fixed	`0.99-4`
debian	forky	fixed	`0.99-4`
debian	sid	fixed	`0.99-4`
debian	trixie	fixed	`0.99-4`

Application impact

Vendor	Product	Versions	Fixed
sophos	threat_detection_engine	`{"endIncluding":"3.36.2"}`
rarlab	unrar	`{"endIncluding":"5.5.4"}`

References

CWEs

CWE-190

Verify integrity in audit chain (admin only). AS-IS.