A local overflow exists in IBM AIX. The nslookup utility fails to validate input resulting in a buffer overflow. With a specially crafted request, an attacker can cause the execution of arbitrary code, but not with escalated privileges. Impact is low risk.
Upgrade AIX using the APAR numbers AIX 4.3.3:IY40519, AIX 5.1: IY39985 and AIX 5.2: IY39992 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.