Vulnerability CVE-2012-6706


Published: 2017-06-22

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].

Type:

CWE-190

(Integer Overflow or Wraparound)

CVSS2 => (AV:N/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
10/10
10/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Sophos -> Threat detection engine 
Rarlab -> Unrar 

 References:
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

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