A local overflow exists in IBM AIX. The namerslv command fails to validate input parameters properly resulting in a buffer overflow. With a specially crafted request, an attacker can cause segmentation faults.
The namerslv utility is not SUID and does not result in privilege escalation or loss of confidentiality, integrity, or availability.
Upgrade to version 4.3.3 (APAR IY29517), 5.1.0 (APAR IY31937) or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.