SB2013010101 - Resource management error in tor.eff Tor
Published: January 1, 2013 Updated: August 11, 2020
Security Bulletin ID
SB2013010101
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource management error (CVE-ID: CVE-2012-5573)
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.
Remediation
Install update from vendor's website.
References
- 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