Input validation error in Tor - CVE-2012-4419
Published: September 14, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43517
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2012-4419
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The compare_tor_addr_to_addr_policy function in or/policies.c in Tor before 0.2.2.39, and 0.2.3.x before 0.2.3.21-rc, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a zero-valued port field that is not properly handled during policy comparison.
Affected software
Tor
How to mitigate CVE-2012-4419
Install update from vendor's website.
External 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/2012/09/13/2
- http://secunia.com/advisories/50583
- 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/62d96284f7e0f81c40d5df7e53dd7b4dfe7e56a5
- https://lists.torproject.org/pipermail/tor-talk/2012-September/025434.html
- https://trac.torproject.org/projects/tor/ticket/6690