Public Date:
766446: CVE-2011-4603 pidgin: SILC remote crash on channel messages

The MITRE CVE dictionary describes this issue as:

The silc_channel_message function in ops.c in the SILC protocol plugin in libpurple in Pidgin before 2.10.1 does not perform the expected UTF-8 validation on message data, which allows remote attackers to cause a denial of service (application crash) via a crafted message, a different vulnerability than CVE-2011-3594.

Find out more about CVE-2011-4603 from the MITRE CVE dictionary dictionary and NIST NVD.


Not vulnerable. This issue did not affect the version of pidgin as shipped with Red Hat Enterprise Linux 6 as it explicitly disables support for the SILC protocol.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 4.3
Base Metrics AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux version 4 (pidgin) RHSA-2011:1820 2011-12-14
Red Hat Enterprise Linux Desktop Workstation version 5 (pidgin) RHSA-2011:1820 2011-12-14
Red Hat Enterprise Linux Optional Productivity Applications version 5 (pidgin) RHSA-2011:1820 2011-12-14

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 6 pidgin Not affected


Red Hat would like to thank the Pidgin project for reporting this issue. Upstream acknowledges Diego Bauche Madero from IOActive as the original reporter.