Wu-ftpd MAPPING_CHDIR overflow could allow remote root access
| wu-ftpd-dir-name (3158) |  High Risk |
Description:
Wu-ftpd is vulnerable to a buffer overflow caused by improper bounds checking of directory names supplied by users when the server is compiled to use the MAPPING_CHDIR feature. A remote attacker with the ability to create directories can overflow a buffer and overwrite static memory space to execute arbitrary code on the system with root privileges.
Platforms Affected:
- Beroftpd, BeroFTPd 1.3.2
- Beroftpd, BeroFTPd 1.3.3
- Beroftpd, BeroFTPd 1.3.4
- Washington University, WU-FTPD 2.4.2 Beta18 VR10
- Washington University, WU-FTPD 2.4.2 Beta18 VR11
- Washington University, WU-FTPD 2.4.2 Beta18 VR12
- Washington University, WU-FTPD 2.4.2 Beta18 VR13
- Washington University, WU-FTPD 2.4.2 Beta18 VR14
- Washington University, WU-FTPD 2.4.2 Beta18 VR15
- Washington University, WU-FTPD 2.4.2 Beta18 VR4
- Washington University, WU-FTPD 2.4.2 Beta18 VR5
- Washington University, WU-FTPD 2.4.2 Beta18 VR6
- Washington University, WU-FTPD 2.4.2 Beta18 VR8
- Washington University, WU-FTPD 2.4.2 Beta18 VR9
- Washington University, WU-FTPD 2.4.2 VR16
- Washington University, WU-FTPD 2.4.2 VR17
- Washington University, WU-FTPD 2.5
Remedy:
For FreeBSD 3.2 and earlier:
Upgrade to the latest version of wu-ftpd (3.3-released dated after 1999-08-30 or later), as listed in FreeBSD Security Advisory FreeBSD-SA-99:03. See References.
Consequences:
Gain Access
References:
- AusCERT Advisory AA-99.01, wu-ftpd/BeroFTPD MAPPING_CHDIR Vulnerability at ftp://www.auscert.org.au/security/advisory/AA-1999.01.wu-ftpd.mapping_chdir.vul.
- BugTraq Mailing List, Thu, 26 Aug 1999 13:43:07 -0400, WU-FTPD Security Update at http://archives.neohapsis.com/archives/bugtraq/1999-q3/0593.html.
- Caldera International, Inc. Security Advisory CSSA-1999-027.0, buffer overflow in wu-ftpd-2.5 at ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-1999:027.0.txt.
- CERT Advisory CA-1999-13, Multiple Vulnerabilities in WU-FTPD at http://www.cert.org/advisories/CA-1999-13.html.
- CIAC Information Bulletin J-065, Wu-ftpd Vulnerability at http://www.ciac.org/ciac/bulletins/j-065.shtml.
- FreeBSD Security Advisory FreeBSD-SA-99:03, Three ftp daemons in ports vulnerable to attack. at ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/old/FreeBSD-SA-99:03.ftpd.asc.
- RHSA-1999:031-01, Another buffer overflow in wu-ftpd is fixed at http://rhn.redhat.com/errata/RHSA-1999-031.html.
- RHSA-1999:043-01, Security problems in WU-FTPD at http://rhn.redhat.com/errata/RHSA-1999-043.html.
- BID-599: Multiple Vendor Wu-Ftpd Buffer Overflow Vulnerability
- CVE-1999-0878: Buffer overflow in WU-FTPD and related FTP servers allows remote attackers to gain root privileges via MAPPING_CHDIR.
Reported:
Aug 26, 1999
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