Title: Wu-Ftpd Remote Format String Stack Overwrite Vulnerability
Severity: CRITICAL
Description:
Washington University ftp daemon (wu-ftpd) is a very popular unix ftp server shipped with many distributions of Linux and other UNIX operating systems. Wu-ftpd is vulnerable to a very serious remote attack in the SITE EXEC implementation. Because of user input going directly into a format string for a *printf function, it is possible to overwrite important data, such as a return address, on the stack. When this is accomplished, the function can jump into shellcode pointed to by the overwritten eip and execute arbitrary commands as root. While exploited in a manner similar to a buffer overflow, it is actually an input validation problem. Anonymous ftp is exploitable making it even more serious as attacks can come anonymously from anywhere on the internet.
It should be noted that the SITE INDEX command is affected as well.
Affected Products:
- Caldera OpenLinux 2.2.0
- Caldera OpenLinux 2.3.0
- Caldera OpenLinux 2.4.0
- Caldera OpenLinux Desktop 2.3.0
- Caldera OpenLinux Standard 1.2.0
- Cobalt Qube 1.0.0
- Conectiva Linux 3.0.0
- Conectiva Linux 4.0.0
- Conectiva Linux 4.0.0 es
- Conectiva Linux 4.1.0
- Conectiva Linux 4.2.0
- Conectiva Linux 5.0.0
- Conectiva Linux 5.1.0
- Debian Linux 2.1.0
- Debian Linux 2.2.0
- Debian Linux 2.2.0 68k
- Debian Linux 2.2.0 alpha
- Debian Linux 2.2.0 arm
- Debian Linux 2.2.0 powerpc
- Debian Linux 2.2.0 sparc
- Debian Linux 2.3.0
- HP HP-UX (VVOS) 10.24.0
- HP HP-UX 10.0.01
- HP HP-UX 10.10.0
- HP HP-UX 10.16.0
- HP HP-UX 10.20.0
- HP HP-UX 10.26.0
- HP HP-UX 11.0.0
- HP HP-UX 11.0.0 4
- HP HP-UX 11.11.0
- RedHat Linux 5.0.0
- RedHat Linux 5.1.0
- RedHat Linux 5.2.0 alpha
- RedHat Linux 5.2.0 i386
- RedHat Linux 5.2.0 sparc
- RedHat Linux 6.0.0
- RedHat Linux 6.0.0 alpha
- RedHat Linux 6.0.0 sparc
- RedHat Linux 6.1.0 alpha
- RedHat Linux 6.1.0 i386
- RedHat Linux 6.1.0 sparc
- RedHat Linux 6.2.0 alpha
- RedHat Linux 6.2.0 i386
- RedHat Linux 6.2.0 sparc
- S.u.S.E. Linux 6.1.0
- S.u.S.E. Linux 6.1.0 alpha
- S.u.S.E. Linux 6.2.0
- S.u.S.E. Linux 6.3.0
- S.u.S.E. Linux 6.3.0 alpha
- S.u.S.E. Linux 6.3.0 ppc
- S.u.S.E. Linux 6.4.0
- S.u.S.E. Linux 6.4.0 alpha
- S.u.S.E. Linux 6.4.0 ppc
- S.u.S.E. Linux 7.0.0 alpha
- S.u.S.E. Linux 7.0.0 i386
- S.u.S.E. Linux 7.0.0 ppc
- S.u.S.E. Linux 7.0.0 sparc
- S.u.S.E. Linux 7.1.0 alpha
- S.u.S.E. Linux 7.1.0 ppc
- S.u.S.E. Linux 7.1.0 sparc
- S.u.S.E. Linux 7.1.0 x86
- S.u.S.E. Linux 7.2.0 i386
- S.u.S.E. Linux 7.3.0 i386
- S.u.S.E. Linux 7.3.0 ppc
- S.u.S.E. Linux 7.3.0 sparc
- SCO eDesktop 2.4.0
- SCO eServer 2.3.0
- SCO eServer 2.3.1
- Slackware Linux 7.0.0
- Slackware Linux 7.1.0
- Turbolinux Turbolinux 3.5.0b2
- Turbolinux Turbolinux 4.0.0
- Washington University wu-ftpd 2.4.2 academ[BETA-18]
- Washington University wu-ftpd 2.4.2 academ[BETA1-15]
- Washington University wu-ftpd 2.5.0 .0
- Washington University wu-ftpd 2.6.0 .0
- WireX Immunix OS 6.2.0
References:
- CORE Security: wuftpd format string exploit
- SecurityFocus: HP-UX 11.0 ftpd SITE EXEC Format String Vulnerability
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