CVE-2012-4922

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-09-14 · updated 2026-06-16
Weakness: CWE-20

Description

The tor_timegm function in common/util.c in Tor before 0.2.2.39, and 0.2.3.x before 0.2.3.22-rc, does not properly validate time values, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a malformed directory object, a different vulnerability than CVE-2012-4419.

Affected products

torproject Tor: through 0.2.2.38; 0.0.2, 0.0.2-pre13, 0.0.2-pre14, 0.0.2-pre15, 0.0.2-pre16, 0.0.2-pre17 (+89)

References

http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088006.html
http://lists.opensuse.org/opensuse-updates/2012-10/msg00005.html
http://openwall.com/lists/oss-security/2012/09/12/5
http://security.gentoo.org/glsa/glsa-201301-03.xml
https://gitweb.torproject.org/tor.git/blob/release-0.2.2:/ReleaseNotes
https://gitweb.torproject.org/tor.git/commit/973c18bf0e84d14d8006a9ae97fde7f7fb97e404
https://lists.torproject.org/pipermail/tor-talk/2012-September/025501.html
https://trac.torproject.org/projects/tor/ticket/6811
http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088006.html
http://lists.opensuse.org/opensuse-updates/2012-10/msg00005.html
http://openwall.com/lists/oss-security/2012/09/12/5
http://security.gentoo.org/glsa/glsa-201301-03.xml

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