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].
Metrics
CVSS 3.0 9.8/10
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://securitytracker.com/id?1027725Third Party Advisory
- http://telussecuritylabs.com/threats/show/TSL20121207-01Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1286Exploit, Third Party Advisory
- https://community.sophos.com/kb/en-us/118424#sixVendor Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10205
- https://lock.cmpxchg8b.com/sophailv2.pdfThird Party Advisory
- https://nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/Vendor Advisory
- 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?1027725Third Party Advisory
- http://telussecuritylabs.com/threats/show/TSL20121207-01Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1286Exploit, Third Party Advisory
- https://community.sophos.com/kb/en-us/118424#sixVendor Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10205
- https://lock.cmpxchg8b.com/sophailv2.pdfThird Party Advisory
- https://nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/Vendor Advisory
- https://security.gentoo.org/glsa/201708-05
- https://security.gentoo.org/glsa/201709-24
- https://security.gentoo.org/glsa/201804-16
Timeline
- Published
- Jun 22, 2017
- Last modified
- Jun 16, 2026
- NVD status
- Modified