CVE-2012-6706
CRITICAL9.8EPSS 2.4%libclamunrar - security update
Published: 6/22/2017Modified: 11/19/2025
Also known as:ALPINE-CVE-2012-6706DEBIAN-CVE-2012-6706
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].
Affected packages (5)
- Alpine/clamavfrom 0, < 0.99.4-r0
- Debian/libclamunrarfrom 0, < 0.99-4
- Debian/libclamunrarfrom 0, < 0.99-0+deb7u2
- Debian/unrar-nonfreefrom 0, < 1:5.5.5-1
- Debian/unrar-nonfreefrom 0, < 1:4.1.4-1+deb7u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |