Debian DSA-2250-1 : citadel - denial of service

medium Nessus Plugin ID 55038

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Synopsis

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

Description

Wouter Coekaerts discovered that the Jabber server component of Citadel, a complete and feature-rich groupware server, is vulnerable to the so-called'billion laughs' attack because it does not prevent entity expansion on received data. This allows an attacker to perform denial of service attacks against the service by sending specially crafted XML data to it.

Solution

Upgrade the citadel packages.

For the oldstable distribution (lenny), this problem has been fixed in version 7.37-8+lenny1.

For the stable distribution (squeeze), this problem has been fixed in version 7.83-2squeeze2.

Plugin Details

Severity: Medium

ID: 55038

File Name: debian_DSA-2250.nasl

Version: 1.11

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 6/10/2011

Updated: 1/4/2021

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:citadel, 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: 3/31/2011

Reference Information

CVE: CVE-2011-1756

DSA: 2250

Detections

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