Integer overflow in Rarlab Unrar
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. 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].
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.100 (95.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 95th percentile — 95.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.100 · newest: 0.100 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.chromium.org/p/project-zero/issues/detail (Exploit, Third Party Advisory)
- nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/ (Vendor Advisory)
- security.gentoo.org/glsa/201709-24 (vendor-advisory)
- community.sophos.com/kb/en-us/118424 (Vendor Advisory)
- security.gentoo.org/glsa/201708-05 (vendor-advisory)
- lock.cmpxchg8b.com/sophailv2.pdf (Third Party Advisory)
- security.gentoo.org/glsa/201804-16 (vendor-advisory)
- kc.mcafee.com/corporate/index
- telussecuritylabs.com/threats/show/TSL20121207-01 (Third Party Advisory)
- securitytracker.com/id (Third Party Advisory)
Frequently asked questions
- What is CVE-2012-6706?
- CVE-2012-6706 is a critical-severity vulnerability in Rarlab Unrar, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2017-06-22.
- How severe is CVE-2012-6706?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2012-6706 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.