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Chosen message with ID ae-200211-020

System: IBM AIX
Topic: Vulnerability in libc
Links: OAR-2002:953
ID: ae-200211-020

The libc RPC implementation of IBM AIX 4.3.x, 5.1.0 and 5.2.0 is susceptible to a Denial-of-Service attack. An attacker can send a carefully crafted RPC request to cause the RPC code to block and wait for further data. Using this knowledge, an attacker can construct a low bitrate stream of requests that can cause the RPC code to block indefinitely thereby denying access to any RPC services. IBM has published an emergency fix to solve this problem.



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