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.
Consequences:
Denial of Service
Remedy:
Update your FTP server, and upgrade to the latest version of wu-ftp, available from the WU-FTPD Web site. See References.
References:
- BugTraq Mailing List, Tue, 15 Oct 1996 08:41:40 +0300: another two bugs in ftpd.
- WU-FTPD Web site: WU-FTPD Development Group.
- 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
Platforms Affected:
- Apple Mac OS
- Cisco IOS
- Compaq Tru64
- Data General DG/UX
- IBM AIX
- IBM OS2
- IETF FTP
- 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
- Washington University WU-FTPD
- WindRiver BSDOS
- HP-UX
Reported:
Oct 15, 1996
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