Critical severity · published Jun 22, 2017
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…
9.8
CVSS
10.1%
EPSS
No
On KEV
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 vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)10.1% · higher than 96% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TD
Threat Detection Engine · Sophos
through 3.36.2 · source: NVD
UN
Unrar · Rarlab
through 5.5.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2012-6706
CVE.org
https://www.cve.org/CVERecord?id=CVE-2012-6706
Third Party Advisory
http://securitytracker.com/id?1027725
Third Party Advisory
http://telussecuritylabs.com/threats/show/TSL20121207-01
Exploit
https://bugs.chromium.org/p/project-zero/issues/detail?id=1286
Vendor Advisory
https://community.sophos.com/kb/en-us/118424#six
kc.mcafee.com
https://kc.mcafee.com/corporate/index?page=content&id=SB10205
Third Party Advisory
https://lock.cmpxchg8b.com/sophailv2.pdf
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