Vulnerability Report

CVE-2012-6706

Title: Rarlab Unrar Memory Corruption

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2012-6706.

CWE Category CWE-190

Published Date Jun 22, 2017

Modified Date May 13, 2026

Exploit Status Not Found

Score 9.8 CVSS v3.0

Exploit Probability (EPSS)

10.03%

Vulnerability Summary

CVE-2012-6706: 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].

Impacted Vendors

rarlab 1

sophos 1

Reference Links

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://kc.mcafee.com/corporate/index?page=content&id=SB10205 https://lock.cmpxchg8b.com/sophailv2.pdf https://nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/ https://security.gentoo.org/glsa/201708-05 https://security.gentoo.org/glsa/201709-24 https://security.gentoo.org/glsa/201804-16 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://kc.mcafee.com/corporate/index?page=content&id=SB10205 https://lock.cmpxchg8b.com/sophailv2.pdf https://nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/ https://security.gentoo.org/glsa/201708-05 https://security.gentoo.org/glsa/201709-24 https://security.gentoo.org/glsa/201804-16

CVSS v3.0

Source Entity [email protected]

Severity CRITICAL

9.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

CVSS v2.0

Source Entity [email protected]

Severity HIGH

10.0

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns