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VID 16045
Severity 40
Port 21
Protocol TCP
Class FTP
Detailed Description The ProFTPD pre6 is vulnerable to a format string attack via NLST command.
ProFTPD pre6 server has a format string vulnerability, makes the remote FTP server crash. It arises when a remote attacker has login credentials or anonymous FTP access and issues a crafted NLST command as the following:

NLST aaaXXXX%u%u%u...["%u" * 36]...%u%u%u%653300u%n

where XXXX have ascii values 0xDC, 0x4F, 0x07 and 0x08.

This vulnerability will cause the remote FTP server crash and allows a remote attacker to gain root access easily.

* Platforms Affected:
ProFTPD 1.2.0pre1
ProFTPD 1.2.0pre2
ProFTPD 1.2.0pre3
ProFTPD 1.2.0pre4
ProFTPD 1.2.0pre5
ProFTPD 1.2.0pre6
Recommendation Upgrade to ProFTPD 1.2pre7 or later from the ProFTPD web site at http://www.proftpd.org/download.html
Related URL CVE-1999-0911 (CVE)
Related URL (SecurityFocus)
Related URL (ISS)