BitchX DNS Buffer Overflow Vulnerability

BitchX is a popular Internet Relay Chat client, written by Colten Edwards. A problem exists which could potentially allow a user to access restricted resources.

The problem occurs in the DNS resolution code. A buffer overflow within the resolver code makes it possible to overwrite stack variables by generating a malformed DNS packet. This problem makes it possible creates a situation where a malicious user may be able to execute code remotely with the UID and GID of the BitchX client. It is necessary for an attacker to control their own DNS to exploit this bug.


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