Silcnet Silc Toolkit up to 1.0 client_entry.c format string

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CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Silcnet Silc Toolkit up to 1.0. It has been declared as critical. This impacts an unknown function in the library lib/silcclient/client_entry.c. Such manipulation leads to format string. This vulnerability is documented as CVE-2009-3051. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Silcnet Silc Toolkit up to 1.0. Affected by this issue is some unknown processing in the library lib/silcclient/client_entry.c. The manipulation with an unknown input leads to a format string vulnerability. Using CWE to declare the problem leads to CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Multiple format string vulnerabilities in lib/silcclient/client_entry.c in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.10, and SILC Client before 1.1.8, allow remote attackers to execute arbitrary code via format string specifiers in a nickname field, related to the (1) silc_client_add_client, (2) silc_client_update_client, and (3) silc_client_nickname_format functions.

The weakness was released 09/10/2009 (Website). The advisory is shared for download at vupen.com. This vulnerability is handled as CVE-2009-3051. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 40899 (FreeBSD : silc-toolkit -- Format string vulnerabilities (24aa9970-9ccd-11de-af10-000c29a67389)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks.

Upgrading to version 1.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (52263), Tenable (40899), SecurityFocus (BID 35940†), Secunia (SA36134†) and Vulnerability Center (SBV-23503†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Silcnet

Name

Silc Toolkit

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Format string
CWE: CWE-134 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 40899
Nessus Name: FreeBSD : silc-toolkit -- Format string vulnerabilities (24aa9970-9ccd-11de-af10-000c29a67389)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 64822
OpenVAS Name: Debian Security Advisory DSA 1879-1 (silc-client/silc-toolkit)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Silc Toolkit 1.1

Timelineinfo

08/01/2009 🔍
08/05/2009 +4 days 🔍
09/03/2009 +28 days 🔍
09/09/2009 +6 days 🔍
09/10/2009 +1 days 🔍
09/10/2009 +0 days 🔍
09/14/2009 +4 days 🔍
03/18/2015 +2011 days 🔍
04/07/2025 +3673 days 🔍

Sourcesinfo

Advisory: vupen.com⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-3051 (🔍)
GCVE (CVE): GCVE-0-2009-3051
GCVE (VulDB): GCVE-100-49916

OVAL: 🔍

X-Force: 52263
SecurityFocus: 35940 - SILC Client Format String Vulnerability
Secunia: 36134
Vulnerability Center: 23503 - SILC Toolkit \x3C 1.1.10 and SILC Client \x3C 1.1.8 Nickname Field Arbitrary Code Execution Vulnerability, High

Entryinfo

Created: 03/18/2015 15:15
Updated: 04/07/2025 13:44
Changes: 03/18/2015 15:15 (60), 02/15/2017 09:08 (9), 08/22/2021 09:44 (4), 08/22/2021 09:46 (1), 04/07/2025 13:44 (17)
Complete: 🔍
Cache ID: 216::103