Debian DSA-1879-1 : silc-client/silc-toolkit - several vulnerabilities

high Nessus Plugin ID 44744

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Synopsis

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

Description

Several vulnerabilities have been discovered in the software suite for the SILC protocol, a network protocol designed to provide end-to-end security for conferencing services. The Common Vulnerabilities and Exposures project identifies the following problems :

- CVE-2008-7159 An incorrect format string in sscanf() used in the ASN1 encoder to scan an OID value could overwrite a neighbouring variable on the stack as the destination data type is smaller than the source type on 64-bit. On 64-bit architectures this could result in unexpected application behaviour or even code execution in some cases.

- CVE-2009-3051 Various format string vulnerabilities when handling parsed SILC messages allow an attacker to execute arbitrary code with the rights of the victim running the SILC client via crafted nick names or channel names containing format strings.

- CVE-2008-7160 An incorrect format string in a sscanf() call used in the HTTP server component of silcd could result in overwriting a neighbouring variable on the stack as the destination data type is smaller than the source type on 64-bit. An attacker could exploit this by using crafted Content-Length header values resulting in unexpected application behaviour or even code execution in some cases.

silc-server doesn't need an update as it uses the shared library provided by silc-toolkit. silc-client/silc-toolkit in the oldstable distribution (etch) is not affected by this problem.

Solution

Upgrade the silc-toolkit/silc-client packages.

For the stable distribution (lenny), this problem has been fixed in version 1.1.7-2+lenny1 of silc-toolkit and in version 1.1.4-1+lenny1 of silc-client.

Plugin Details

Severity: High

ID: 44744

File Name: debian_DSA-1879.nasl

Version: 1.12

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 2/24/2010

Updated: 1/4/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:silc-toolkit, cpe:/o:debian:debian_linux:5.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/4/2009

Reference Information

CVE: CVE-2008-7159, CVE-2008-7160, CVE-2009-3051, CVE-2009-3163

BID: 36194

CWE: 134

DSA: 1879

Detections

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