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Fencer Intel
critical 9.8

CVE-2012-6706 in the critical feed json

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…

published 2017-06-22 9 y ago modified 2026-06-16 4 mo ago also EUVD-2012-6548

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
10.1%
EPSS 10.1% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

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].

Patch / fix

  • libclamunrar Debian 14, Debian 13, Debian 12 0.99-4
  • unrar-nonfree Debian 14, Debian 13, Debian 12 1:5.5.5-1

debian advisories DEBIAN-CVE-2012-6706

  • libclamunrar Ubuntu 14.04 LTS 0.99-0ubuntu0.14.04.2
  • libclamunrar Ubuntu 16.04 LTS 0.99-1ubuntu0.1
  • libclamunrar Ubuntu 18.04 LTS 0.99-4ubuntu1
  • unrar-nonfree Ubuntu 16.04 LTS 1:5.3.2-1+deb9u1build0.16.04.1

ubuntu advisories UBUNTU-CVE-2012-6706

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • unrar SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +9 more 5.6.1-4.5.1
  • clamav SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 0.99.4-0.20.7.2
  • unrar SLES for SAP 11 SP4, SLES 11 SP4 5.6.1-5.3.1
  • clamav SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2 +4 more 0.99.4-33.9.1
  • unrar SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 3.80.2-4.1
  • clamav SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 0.99.2-0.19.1
  • unrar SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for SAP 12 +7 more 5.0.14-3.1
  • clamav SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for SAP 12 +5 more 0.99.2-32.1

suse advisories SUSE-SU-2021:2834-1SUSE-SU-2018:0863-1SUSE-SU-2018:0862-1SUSE-SU-2018:0809-1SUSE-SU-2017:1760-1SUSE-SU-2017:1763-1

  • clamav openSUSE Tumbleweed 0.103.3-1.4

opensuse advisories openSUSE-SU-2024:10685-1

  • clamav Alpine 3.24, Alpine 3.23, Alpine 3.22 +14 more 0.99.4-r0

alpine advisories ALPINE-CVE-2012-6706

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • clamav Arch Linux 0.99.4-1
  • libunrar Arch Linux 1:5.5.5-1
  • unrar Arch Linux 1:5.5.5-1

arch linux advisories AVG-602AVG-604

Exploit prediction

10.11% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.chromium.org https://bugs.chromium.org/p/project-zero/issues/detail?id=1286 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.