2715 : WU-FTPD S/KEY Authentication ftpd.c skey_challenge Function Remote Overflow
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Info

Last Modified

7 months ago

Percent Complete

100%

Disclosure

Jun 07, 2000

Discovery

Unknown

Dates

Exploit

Unknown

Solution

Unknown

Description

A remote overflow exists in WU-FTPD if S/KEY support is enabled. The skey_challenge function in ftpd.c fails to perform bounds checking on the name variable resulting in a buffer overflow. With a specially crafted request, a remote attacker can execute arbitrary code.

Classification

Location: Remote/Network Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity, Loss of Availability
Exploit: Exploit Unknown
Disclosure: OSVDB Verified

Solution

Upgrade to version 2.6.2-13 (Available on some Linux distributions) or higher, as it has been reported to fix this vulnerability. In addition, WU-FTPD Development Group has released a patch for some older versions of the main distribution.

Products

WU-FTPD Development Group	wu-ftpd	2.5.0
		2.6.1
		2.6.2
		2.6.0

References

Secunia Advisory ID: 10077 11350
ISS X-Force ID: 13518
CVE ID: 2004-0185 (see also: NVD)
Bugtraq ID: 8893
Vendor Specific Solution URL: ftp://ftp.wu-ftpd.org/pub/wu-ftpd/patches/apply_to_2.6.2/skeychallenge.patch
Mail List Post: http://archives.neohapsis.com/archives/bugtraq/2000-06/0040.html
Other Advisory URL: http://packetstormsecurity.org/0310-advisories/wuftpd-skey.txt
http://www.debian.org/security/2004/dsa-457
http://www.fedoralegacy.org/updates/RH7.3/2004-07-19-FLSA_2004_1553__Updated_sysk ......
http://www4.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBTU01012
CIAC Advisory: o-119
RedHat RHSA: RHSA-2004:096

Tools & Filters

Nessus	12475 14372 15294

Credit

Michal Zalewski - lcamtufcoredump.cx -
Michael Hendrickx - michaelscanit.be - scanit

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