Pidgin Security Advisory

Title	MSN Remote "Nudge" DoS
Date	2007-09-27
CVE Name	CVE-2007-4996
Discovered By	Evan Schoenberg
Summary	MSN nudges sent from unknown buddies can cause libpurple 2.2.0 to crash
Description	A remote MSN user that is not on the buddy list can cause a denial of service (crash) by sending a nudge message. The protocol plugin attempts to look up the buddy's information and accesses an invalid memory location if the user is not on the buddy list. This only affects libpurple version 2.2.0, older versions are not affected.
Fixed in Version	2.2.1
Fix	The nudge functionality in the MSN protocol has been rewritten to avoid an unnecessary lookup of buddy information.

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