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Debian Security Advisory DSA 3203-1 (tor - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Several denial-of-service issues have been discovered in Tor, a connection-based low-latency anonymous communication system. Jowr discovered that very high DNS query load on a relay could trigger an assertion error. A relay could crash with an assertion error if a buffer of exactly the wrong layout was passed to buf_pullup() at exactly the wrong time.
Affected Software
Affected Software
tor on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
For the stable distribution (wheezy), these problems have been fixed in version 0.2.4.26-1. For the testing distribution (jessie) and unstable distribution (sid), these problems have been fixed in version 0.2.5.11-1. Furthermore, this update disables support for SSLv3 in Tor. All versions of OpenSSL in use with Tor today support TLS 1.0 or later. Additionally, this release updates the geoIP database used by Tor as well as the list of directory authority servers, which Tor clients use to bootstrap and who sign the Tor directory consensus document. We recommend that you upgrade your tor packages.