CVE-2012-6706: Detailed Vulnerability Analysis and Overview

CVE-2012-6706 Vulnerability Summary

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].

CVE-2012-6706: Detailed Information and External References

EPSS

0.04929

EPSS %

0.93098

References

0.04929

• 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

CWE

CWE-190

CAPEC

0.04929

• Forced Integer Overflow: This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.

Vulnerable Configurations

• cpe:2.3:a:sophos:threat_detection_engine:-:*:*:*:*:*:*:*
  cpe:2.3:a:sophos:threat_detection_engine:-:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:threat_detection_engine:3.36.2:*:*:*:*:*:*:*
  cpe:2.3:a:sophos:threat_detection_engine:3.36.2:*:*:*:*:*:*:*
• cpe:2.3:a:rarlab:unrar:0.0.1:*:*:*:*:*:*:*
  cpe:2.3:a:rarlab:unrar:0.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:rarlab:unrar:5.5.4:*:*:*:*:*:*:*
  cpe:2.3:a:rarlab:unrar:5.5.4:*:*:*:*:*:*:*

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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