CVE-2011-0491

Name of the Vulnerable Software and Affected Versions Tor versions prior to 0.2.1.29 Tor versions 0.2.2.x prior to 0.2.2.21-alpha

Description The issue is related to the tor realloc function, which does not validate a certain size value during memory allocation. This could allow remote attackers to cause a denial of service, resulting in a daemon crash, via unspecified vectors. The problem is related to underflow errors.

Recommendations For Tor versions prior to 0.2.1.29, update to version 0.2.1.29 or later. For Tor versions 0.2.2.x prior to 0.2.2.21-alpha, update to version 0.2.2.21-alpha or later.