CVE-2009-3163

Multiple format string vulnerabilities in lib/silcclient/command.c in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.10, and SILC Client 1.1.8 and earlier, allow remote attackers to execute arbitrary code via format string specifiers in a channel name, related to (1) silc_client_command_topic, (2) silc_client_command_kick, (3) silc_client_command_leave, and (4) silc_client_command_users.

Published: 2009-09-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-3163 is rated Moderate Risk (61.3/100): CVSS High severity, with high exploitation likelihood (EPSS 4.53%, 90th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-3163

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 4.87% 4.53% -0.34%
2 2025-03-30 6.69% 4.87% -1.82%
3 2025-03-29 — 6.69% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-3163

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2009-3163

OS Trackers for CVE-2009-3163

vendor priority summary link
gentoo normal CVE-2009-3163: 1 GLSA(s) (201006-07), 2 atom(s) (net-im/silc-client, net-im/silc-toolkit); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-3163
redhat high — https://access.redhat.com/security/cve/CVE-2009-3163
ubuntu medium CVE-2009-3163 medium priority: Ubuntu including 3 source packages (silc-client, silc-server, silc-toolkit), 18 status rows across 6 suites (dapper, hardy, intrepid, jaunty, karmic, upstream): not-affected 9, ignored 4, DNE 2, needs-triage 2, released 1. https://ubuntu.com/security/CVE-2009-3163

Vendor comments (NVD) for CVE-2009-3163

  • Red Hat (2009-09-11T00:00:00)

    Not vulnerable. This issue did not affect the versions of libsilc as shipped with Red Hat Enterprise Linux 4, or 5.

Affected software / configurations for CVE-2009-3163

Vendor Product Version Raw CPE
silcnet silc_client <= 1.1.8 cpe:2.3:a:silcnet:silc_client:*:*:*:*:*:*:*:*
silcnet silc_client 1.1.1 cpe:2.3:a:silcnet:silc_client:1.1.1:*:*:*:*:*:*:*
silcnet silc_client 1.1.2 cpe:2.3:a:silcnet:silc_client:1.1.2:*:*:*:*:*:*:*
silcnet silc_client 1.1.3 cpe:2.3:a:silcnet:silc_client:1.1.3:*:*:*:*:*:*:*
silcnet silc_client 1.1.4 cpe:2.3:a:silcnet:silc_client:1.1.4:*:*:*:*:*:*:*
silcnet silc_client 1.1.6 cpe:2.3:a:silcnet:silc_client:1.1.6:*:*:*:*:*:*:*
silcnet silc_client 1.1.7 cpe:2.3:a:silcnet:silc_client:1.1.7:*:*:*:*:*:*:*
silcnet silc_toolkit <= 1.1.9 cpe:2.3:a:silcnet:silc_toolkit:*:*:*:*:*:*:*:*
silcnet silc_toolkit 1.1 cpe:2.3:a:silcnet:silc_toolkit:1.1:*:*:*:*:*:*:*
silcnet silc_toolkit 1.1.1 cpe:2.3:a:silcnet:silc_toolkit:1.1.1:*:*:*:*:*:*:*
silcnet silc_toolkit 1.1.2 cpe:2.3:a:silcnet:silc_toolkit:1.1.2:*:*:*:*:*:*:*
silcnet silc_toolkit 1.1.3 cpe:2.3:a:silcnet:silc_toolkit:1.1.3:*:*:*:*:*:*:*
silcnet silc_toolkit 1.1.4 cpe:2.3:a:silcnet:silc_toolkit:1.1.4:*:*:*:*:*:*:*
silcnet silc_toolkit 1.1.5 cpe:2.3:a:silcnet:silc_toolkit:1.1.5:*:*:*:*:*:*:*
silcnet silc_toolkit 1.1.6 cpe:2.3:a:silcnet:silc_toolkit:1.1.6:*:*:*:*:*:*:*
silcnet silc_toolkit 1.1.8 cpe:2.3:a:silcnet:silc_toolkit:1.1.8:*:*:*:*:*:*:*

References for CVE-2009-3163

cvelogic Threat Intelligence