Resource management error in Tor - CVE-2012-5573
Published: January 1, 2013 / Updated: August 11, 2020
Vulnerability identifier: #VU43220
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2012-5573
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: tor.eff.org
Affected software:
Tor
Tor
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The connection_edge_process_relay_cell function in or/relay.c in Tor before 0.2.3.25 maintains circuits even if an unexpected SENDME cell arrives, which might allow remote attackers to cause a denial of service (memory consumption or excessive cell reception rate) or bypass intended flow-control restrictions via a RELAY_COMMAND_SENDME command.
How to mitigate CVE-2012-5573
Install update from vendor's website.
Sources
- http://openwall.com/lists/oss-security/2012/11/26/11
- http://secunia.com/advisories/51329
- http://security.gentoo.org/glsa/glsa-201301-03.xml
- https://bugs.gentoo.org/show_bug.cgi?id=444804
- https://bugzilla.redhat.com/show_bug.cgi?id=880310
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80289
- https://gitweb.torproject.org/arma/tor.git/commitdiff/b9b54568c0bb64c32bd0b362954bdbc8c1234b16
- https://gitweb.torproject.org/tor.git/blob/release-0.2.3:/ReleaseNotes
- https://trac.torproject.org/projects/tor/ticket/6252