Buffer overflow in the AIM and ICQ module in Gaim before 1.5.0 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via an away message with a large number of AIM substitution strings, such as %t or %n.

Gaim before 1.3.1 allows remote attackers to cause a denial of service (application crash) via a Yahoo! message with non-ASCII characters in a file name.

Gaim before 1.3.1 allows remote attackers to cause a denial of service (crash) via a malformed MSN message that leads to a memory allocation of a large size, possibly due to an integer signedness error.

The AIM/ICQ module in Gaim before 1.5.0 allows remote attackers to cause a denial of service (application crash) via a filename that contains invalid UTF-8 characters.