Debian DSA-3216-1 : tor - security update

high Nessus Plugin ID 82624

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Synopsis

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

Description

Several vulnerabilities have been discovered in Tor, a connection-based low-latency anonymous communication system :

- CVE-2015-2928 'disgleirio' discovered that a malicious client could trigger an assertion failure in a Tor instance providing a hidden service, thus rendering the service inaccessible.

- CVE-2015-2929 'DonnchaC' discovered that Tor clients would crash with an assertion failure upon parsing specially crafted hidden service descriptors.

Introduction points would accept multiple INTRODUCE1 cells on one circuit, making it inexpensive for an attacker to overload a hidden service with introductions. Introduction points now no longer allow multiple cells of that type on the same circuit.

Solution

Upgrade the tor packages.

For the stable distribution (wheezy), these problems have been fixed in version 0.2.4.27-1.

Plugin Details

Severity: High

ID: 82624

File Name: debian_DSA-3216.nasl

Version: 1.5

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 4/8/2015

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: 4/6/2015

Vulnerability Publication Date: 1/24/2020

Reference Information

CVE: CVE-2015-2928, CVE-2015-2929

DSA: 3216

Detections

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