CVE-2003-0087: Buffer overflow in libIM library (libIM.a) for National Language Support (NLS) on AIX 4.3 through 5.2 allow...

Security readout for executives and security teams

This is an old IBM AIX local privilege-escalation flaw. A user who already has local access to an affected AIX host could abuse the National Language Support input-method library to gain higher privileges. It is not described as remotely exploitable. Exposure is most likely in legacy IBM AIX environments still running AIX 4.3 through 5.2. Risk depends on whether untrusted users, service accounts, application users, or compromised accounts can execute local programs on those hosts. Treat this as high priority for any still-operational legacy AIX estate. It is not a broad internet worm risk, but it can turn a low-privilege foothold into deeper control of critical Unix infrastructure. Mitigation focus: Inventory AIX 4.3 through 5.2 systems and prioritize externally important hosts.; Review IBM APAR guidance for IY40307, IY40317, and IY40320.; Apply vendor fixes where IBM confirms applicability for the installed AIX level..

Prepared

Jun 30, 2026, 03:02 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.