CVE-2009-3083: Pidgin Libpurple

Medium severity, CVSS 5.0. EPSS: 2.7% chance of exploitation in the next 30 days.

The msn_slp_sip_recv function in libpurple/protocols/msn/slp.c in the MSN protocol plugin in libpurple in Pidgin before 2.6.2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an SLP invite message that lacks certain required fields, as demonstrated by a malformed message from a KMess client.

Affected products

• Pidgin Libpurple: any version
• Pidgin Pidgin: up to and including 2.6.1; version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.1.0 only; version 2.1.1 only; …

Published 2009-09-08. Last modified 2026-06-16.