Joerg Kurlbaum has discovered a weakness in Gaim-Encryption, which can be exploited by malicious people to cause a DoS (Denial of Service).
The weakness is caused due to an error in the "GE_received_key()" function of "keys.c" when using the "sscanf()" function to determine the start position of the key in an encrypted message. This can be exploited to crash Gaim via a malformed encrypted message if the Gaim-Encryption plugin is enabled.
The weakness has been confirmed in version 2.38 on Gaim v1.3.1-0.fc4. Other versions may also be affected.
Solution: Disable the Gaim-Encryption plugin when not sending encrypted messages.
Provided and/or discovered by: Joerg Kurlbaum
Original Advisory: Debian:
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Subject: Gaim-Encryption Malformed Encrypted Message Denial of Service
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