TITLE:
Gaim-Encryption Malformed Encrypted Message Denial of Service

SECUNIA ADVISORY ID:
SA17739

VERIFY ADVISORY:
http://secunia.com/advisories/17739/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Gaim-Encryption 2.x
http://secunia.com/product/6229/

DESCRIPTION:
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:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=337127

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