Premature PASV command could cause FTP server crash, possibly compromising system passwords
| ftp-pasvcore (200) |  Medium Risk |
Description:
An FTP daemon allows a premature PASV command, which can cause some FTP daemons to crash with a core dump. FTP core dumps can be used to salvage encrypted passwords, bypassing any shadow password scheme.
Platforms Affected:
- Apple, Mac OS
- Cisco, IOS
- Compaq, Tru64
- Data General, DG/UX
- HP, HP-UX
- IBM, AIX
- IBM, OS2
- Linux, Kernel
- Microsoft, Windows 2000
- Microsoft, Windows 2003 Server
- Microsoft, Windows 95
- Microsoft, Windows 98
- Microsoft, Windows 98SE
- Microsoft, Windows Me
- Microsoft, Windows NT 4.0
- Microsoft, Windows XP
- Novell, NetWare
- SCO, SCO Unix
- SGI, IRIX
- Sun, Solaris
- Various vendors, FTP
- Washington University, WU-FTPD
- WindRiver, BSDOS
Remedy:
Update your FTP server, and upgrade to the latest version of wu-ftp, available from the WU-FTPD Web site. See References.
Consequences:
Denial of Service
References:
- BugTraq Mailing List, Tue, 15 Oct 1996 08:41:40 +0300, another two bugs in ftpd at http://archives.neohapsis.com/archives/bugtraq/1996_4/0044.html.
- WU-FTPD Web site, WU-FTPD Development Group at http://www.wu-ftpd.org.
- CVE-1999-0075: PASV core dump in wu-ftpd daemon when attacker uses a QUOTE PASV command after specifying a username and password.
- CVE-1999-0076: Buffer overflow in wu-ftp from PASV command causes a core dump.
- OSVDB ID: 5742: WU-FTPD QUOTE PASV Core Dump
Reported:
Oct 15, 1996
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