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Debian DSA-3203-1 : tor - security update

high Nessus Plugin ID 82001

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Synopsis

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

Description

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.

Solution

Upgrade the tor packages.

For the stable distribution (wheezy), these problems have been fixed in version 0.2.4.26-1.


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.

See Also

https://packages.debian.org/source/wheezy/tor

https://www.debian.org/security/2015/dsa-3203

Plugin Details

Severity: High

ID: 82001

File Name: debian_DSA-3203.nasl

Version: 1.6

Type: local

Agent: unix

Published: 3/24/2015

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:tor, cpe:/o:debian:debian_linux:7.0

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

Patch Publication Date: 3/22/2015

Vulnerability Publication Date: 1/24/2020

Reference Information

CVE: CVE-2015-2688, CVE-2015-2689

DSA: 3203