[UNIX] AFTPd Core Dump Vulnerability

From: support@securiteam.com
Date: 01/12/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Sat, 12 Jan 2002 10:46:26 +0100 (CET)

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  AFTPd Core Dump Vulnerability
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SUMMARY

When a vulnerable version of AFTPd is used under FreeBSD, other systems
might be also affected (AFTPd is not the offical FreeBSD FTP server), it
is possible to cause the program to core dump the memory by issuing a
special FTP change directory command. If the authentication mechanism is
accessed prior to the core dump, the password file will be found inside
the core dump.

DETAILS

Vulnerable systems:
AFTPd version 5.4.4 and prior

Issuing an authentication request (doen't have to be a valid one) followed
by the command: "cd ~" will cause the FTP server to crash, dumping the
memory file into the currently accessed directory. The core dump will
include the password file the FTP server has just accessed in order to
authenticate the user.

ADDITIONAL INFORMATION

The information has been provided by <mailto:nu_omega_tau@altavista.com>
Nu Omega Tau.

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