Joined: 12 May 2004
|Posted: Fri Apr 10, 2009 2:26 pm Post subject: [ GLSA 200904-11 ] Tor: Multiple vulnerabilities
|Gentoo Linux Security Advisory
Title: Tor: Multiple vulnerabilities (GLSA 200904-11)
Date: April 08, 2009
Bug(s): #250018, #256078, #258833
Multiple vulnerabilities in Tor might allow for heap corruption, Denial of Service, escalation of privileges and information disclosure.
Tor is an implementation of second generation Onion Routing, a connection-oriented anonymizing communication service.
Vulnerable: < 0.2.0.34
Unaffected: >= 0.2.0.34
Architectures: All supported architectures
- Theo de Raadt reported that the application does not properly drop privileges to the primary groups of the user specified via the "User" configuration option (CVE-2008-5397).
- rovv reported that the "ClientDNSRejectInternalAddresses" configuration option is not always enforced (CVE-2008-5398).
- Ilja van Sprundel reported a heap-corruption vulnerability that might be remotely triggerable on some platforms (CVE-2009-0414).
- It has been reported that incomplete IPv4 addresses are treated as valid, violating the specification (CVE-2009-0939).
- Three unspecified vulnerabilities have also been reported (CVE-2009-0936, CVE-2009-0937, CVE-2009-0938).
A local attacker could escalate privileges by leveraging unintended supplementary group memberships of the Tor process. A remote attacker could exploit these vulnerabilities to cause a heap corruption with unknown impact and attack vectors, to cause a Denial of Service via CPU consuption or daemon crash, and to weaken anonymity provided by the service.
There is no known workaround at this time.
All Tor users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/tor-0.2.0.34"