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Debian DSA-2136-1 : tor - buffer overflow

critical Nessus Plugin ID 51398

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Synopsis

The remote Debian host is missing a security-related update.

Description

Willem Pinckaers discovered that Tor, a tool to enable online anonymity, does not correctly handle all data read from the network.
By supplying specially crafted packets a remote attacker can cause Tor to overflow its heap, crashing the process. Arbitrary code execution has not been confirmed but there is a potential risk.

In the stable distribution (lenny), this update also includes an update of the IP address for the Tor directory authority gabelmoo and addresses a weakness in the package's postinst maintainer script.

Solution

Upgrade the tor packages.

For the stable distribution (lenny) this problem has been fixed in version 0.2.1.26-1~lenny+4.

See Also

https://www.debian.org/security/2010/dsa-2136

Plugin Details

Severity: Critical

ID: 51398

File Name: debian_DSA-2136.nasl

Version: 1.8

Type: local

Agent: unix

Published: 1/3/2011

Updated: 1/4/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:tor, cpe:/o:debian:debian_linux:5.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/21/2010

Reference Information

CVE: CVE-2010-1676

BID: 45500

DSA: 2136