Debian DLA-178-1 : tor security update

high Nessus Plugin ID 82163

Synopsis

The remote Debian host is missing a security update.

Description

Several issues have been discovered and fixed in Tor, a connection-based low-latency anonymous communication system.

o Jowr discovered that very high DNS query load on a relay could trigger an assertion error.

o 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.

o When sending the address of the chosen rendezvous point to a hidden service clients were leaking to the hidden service they were on a little-endian or big-endian systems.

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 trust to sign the Tor directory consensus document.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected tor, tor-dbg, and tor-geoipdb packages.

See Also

https://lists.debian.org/debian-lts-announce/2015/03/msg00015.html

https://packages.debian.org/source/squeeze-lts/tor

Plugin Details

Severity: High

ID: 82163

File Name: debian_DLA-178.nasl

Version: 1.4

Type: local

Agent: unix

Published: 3/26/2015

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:tor, p-cpe:/a:debian:debian_linux:tor-dbg, p-cpe:/a:debian:debian_linux:tor-geoipdb, cpe:/o:debian:debian_linux:6.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 3/22/2015