Debian DSA-2197-1 : quagga - denial of service

medium Nessus Plugin ID 52741

Synopsis

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

Description

It has been discovered that the Quagga routing daemon contains two denial-of-service vulnerabilities in its BGP implementation :

- CVE-2010-1674 A crafted Extended Communities attribute triggers a NULL pointer dereference which causes the BGP daemon to crash. The crafted attributes are not propagated by the Internet core, so only explicitly configured direct peers are able to exploit this vulnerability in typical configurations.

- CVE-2010-1675 The BGP daemon resets BGP sessions when it encounters malformed AS_PATHLIMIT attributes, introducing a distributed BGP session reset vulnerability which disrupts packet forwarding. Such malformed attributes are propagated by the Internet core, and exploitation of this vulnerability is not restricted to directly configured BGP peers.

This security update removes AS_PATHLIMIT processing from the BGP implementation, preserving the configuration statements for backwards compatibility. (Standardization of this BGP extension was abandoned long ago.)

Solution

Upgrade the quagga packages.

For the oldstable distribution (lenny), these problems have been fixed in version 0.99.10-1lenny5.

For the stable distribution (squeeze), these problems have been fixed in version 0.99.17-2+squeeze2.

See Also

https://security-tracker.debian.org/tracker/CVE-2010-1674

https://security-tracker.debian.org/tracker/CVE-2010-1675

https://packages.debian.org/source/squeeze/quagga

https://www.debian.org/security/2011/dsa-2197

Plugin Details

Severity: Medium

ID: 52741

File Name: debian_DSA-2197.nasl

Version: 1.13

Type: local

Agent: unix

Published: 3/22/2011

Updated: 1/4/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: Low

Score: 2.7

CVSS v2

Risk Factor: Medium

Base Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:quagga, cpe:/o:debian:debian_linux:5.0, cpe:/o:debian:debian_linux:6.0

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

Patch Publication Date: 3/21/2011

Reference Information

CVE: CVE-2010-1674, CVE-2010-1675

DSA: 2197