CVE-2012-4922
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…
Does this matter?
Lower severity and a low EPSS score (2.23%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 2.23% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- torproject/tor
- Source
- cve@mitre.org
EPSS 2.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.