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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.1%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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].
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 10.11% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-190
- Affected
- sophos/threat detection engine · rarlab/unrar
- Source
- cve@mitre.org
EPSS 10.1% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.