FTPD glob Heap Corruption

The FTPD glob vulnerability manifests itself in handling of the glob command. The problem is not a typical buffer overflow or format string vulnerability, but a combination of two bugs: an implementation of the glob command that does not properly return an error condition when interpreting the string ~, and then frees memory which may contain user supplied data. This vulnerability is potentially exploitable by any user who is able to log in to a vulnerable server, including users with anonymous access. If successful, an attacker may be able to execute arbitrary code with the privileges of FTPD, typically root.
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