[From Secunia Stay Secure
A vulnerability has been identified in Sybase ASE (Adaptive Server Enterprise), which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.
The vulnerability is caused due to a boundary error when handling remote password arrays. This can be exploited to cause a heap overflow by supplying a remote password array with invalid lengths. Reportedly, execution of arbitrary code is not believed possible but cannot be ruled out completely.
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