A NULL pointer dereference flaw was found in the Pidgin IRC protocol plugin, by handling IRC topics. A malicious IRC server could send a specially-crafted IRC TOPIC message, which once received by Pidgin would lead to denial of service (Pidgin crash). References: ---------- http://pidgin.im/news/security/?id=40 http://pidgin.im/pipermail/devel/2009-September/008850.html Upstream patch: --------------- http://developer.pidgin.im/viewmtn/revision/info/ad2c6ee53ec9122b25aeb1f918db53be69bdeac3 Credit: ------- Cristofaro Mune
This issue affects the versions of Pidgin package, as shipped with Red Hat Enterprise Linux 3, 4, and 5. This issue was already addressed in the versions of Pidgin package, as shipped with Fedora 10 and 11. Relevant versions: Fedora 10: pidgin-2.6.2-1.fc10.1 Fedora 11: pidgin-2.6.2-1.fc11
Created attachment 360074 [details] PoC from issue reporter - Cristofaro Mune
MITRE's CVE-2009-2703 record: ----------------------------- libpurple/protocols/irc/msgs.c in the IRC protocol plugin in libpurple in Pidgin before 2.6.2 allows remote IRC servers to cause a denial of service (NULL pointer dereference and application crash) via a TOPIC message that lacks a topic string. References: ----------- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2703 http://developer.pidgin.im/viewmtn/revision/info/ad2c6ee53ec9122b25aeb1f918db53be69bdeac3 http://www.pidgin.im/news/security/index.php?id=40 http://www.securityfocus.com/bid/36277 http://secunia.com/advisories/36601
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Via RHSA-2009:1453 https://rhn.redhat.com/errata/RHSA-2009-1453.html
This issue has been addressed in following products: Red Hat Enterprise Linux 3 Via RHSA-2009:1535 https://rhn.redhat.com/errata/RHSA-2009-1535.html