Debian DSA-2276-1 : asterisk - multiple denial of service

medium Nessus Plugin ID 55554

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Synopsis

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

Description

Paul Belanger reported a vulnerability in Asterisk identified as AST-2011-008(CVE-2011-2529 ) through which an unauthenticated attacker may crash an Asterisk server remotely. A package containing a NULL char causes the SIP header parser to alter unrelated memory structures.

Jared Mauch reported a vulnerability in Asterisk identified as AST-2011-009through which an unauthenticated attacker may crash an Asterisk server remotely. If a user sends a package with a Contact header with a missing left angle bracket (<) the server will crash. A possible workaround is to disable chan_sip.

The vulnerability identified as AST-2011-010(CVE-2011-2535 ) reported about an input validation error in the IAX2 channel driver. An unauthenticated attacker may crash an Asterisk server remotely by sending a crafted option control frame.

Solution

Upgrade the asterisk packages.

For the oldstable distribution (lenny), this problem has been fixed in version 1.4.21.2~dfsg-3+lenny5.

For the stable distribution (squeeze), this problem has been fixed in version 1.6.2.9-2+squeeze3.

Plugin Details

Severity: Medium

ID: 55554

File Name: debian_DSA-2276.nasl

Version: 1.14

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 7/12/2011

Updated: 1/4/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:asterisk, 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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/10/2011

Reference Information

CVE: CVE-2011-2529, CVE-2011-2535

BID: 48431

DSA: 2276

Detections

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