N-132: Wu-ftpd Buffer Overflow Vulnerability

N-132: Wu-ftpd Buffer Overflow Vulnerability Privacy and Legal Notice INFORMATION BULLETIN N-132: Wu-ftpd Buffer Overflow Vulnerability [Red Hat Security Advisory RHSA-2003:245-15] July 31, 2003 18:00 GMT
[Revised 13 Aug 2003]
[Revised 14 Aug 2003]
[Revised 5 Sept 2003]
[Revised 8 Oct 2003]
[Revised 10 Jun 2004]


PROBLEM:	A buffer overflow vulnerability exists in wu-ftpd versions 2.6.2 and earlier. WU-FTPD is a popular ftp daemon used on the Internet, and on many anonymous ftp sites all around the world.
PLATFORM:	Red Hat: Linux 7.1, Linux 7.1 for iSeries, Linux 7.1 for pSeries, Linux 7.2, Linux 7.3, Linux 8.0 Sun: Solaris 9, Sun Linux 5.0 Hewlett Packard: B.11.22, B.11.11, and B.11.00 running wu-ftpd B.11.00 and B.11.11 web OTHER PLATFORMS WILL BE ADDED WHEN VENDOR BULLETINS ARE RELEASED.
DAMAGE:	Successful exploitation could cause a buffer overflow and allow for an increase in privileges. Denial of service attacks may be possible.
SOLUTION:	Install updated wu-ftpd packages from Red Hat or obtain the realpath.patch from the WU-FTPD Development Group web site.

VULNERABILITY ASSESSMENT:	The risk is HIGH. A remote attacker could gain root privileges.

LINKS:
CIAC BULLETIN:	http://www.ciac.org/ciac/bulletins/n-132.shtml
ORIGINAL BULLETIN:	https://rhn.redhat.com/errata/RHSA-2003-245.html
ADDITIONAL INFORMATION:	iSEC: http://isec.pl/vulnerabilities/isec-0011-wu-ftpd.txt Sun Alert ID 56121: http://www.sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F56121&zone_32=category%3Asecurity Sun Alert ID 56220: http://www.sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F56220&zone_32=category%3Asecurity Visit Hewlett Packard Subscription Section for: HPSBUX0309-277, SSRT3606 rev.2 WU-FTPD Development Group: realpath.patch for WU-FTPD 2.6.2 http://www.wu-ftpd.org/&zone_32=category%3Asecurity ADDITIONAL VENDOR INFORMATION WILL BE ADDED WHEN IT BECOMES AVAILABLE.

Revision History: 08/13/03 - Added Sun's Alert ID: 56121
                  08/14/03 - Added Sun's Alert ID: 56220
                  09/05/03 - Added Hewlett Packard vulnerable systems and added WU-FTPD Development Group Link
                  10/08/03 - Added Hewlett Packard revised vulnerable systems and added a link. 
                  06/10/04 - Added reference to Hewlett Packard's revised Security Bulletin HPSBUX0309-277, 
                             SSRT3606 rev2 that provides updated patches.
							 
[***** Start Red Hat Security Advisory RHSA-2003:245-15 *****]

Updated wu-ftpd packages fix remote vulnerability.

Advisory: RHSA-2003:245-15 
Last updated on: 31-JUL-03 
Affected Products: Red Hat Linux 7.1
Red Hat Linux 7.1 for iSeries
Red Hat Linux 7.1 for pSeries
Red Hat Linux 7.2
Red Hat Linux 7.3
Red Hat Linux 8.0 
CVEs (cve.mitre.org): CAN-2003-0466

Security Advisory 

Details:

Updated wu-ftpd packages are now available that fix a remotely exploitable
security issue.

The wu-ftpd package contains the Washington University FTP (File Transfer
Protocol) server daemon. FTP is a method of transferring files between
computers on a network.

An off-by-one bug has been discovered in versions of wu-ftpd up to and
including 2.6.2. On a vulnerable system, a remote attacker would be able
to exploit this bug to gain root privileges.

Red Hat Linux 7.1 and 7.2 contain a version of wu-ftpd that is affected by
this bug, although it is believed this issue will not be remotely
exploitable due to compiler padding of the buffer targeted for the overflow. 

Red Hat Linux 7.3 and 8.0 contain a version of wu-ftpd that is remotely
exploitable.

Red Hat advises all users of wu-ftpd to upgrade to these erratum packages,
which contain a security patch and is not vulnerable to this issue.

Red Hat would like to thank Wojciech Purczynski and Janusz Niewiadomski of
ISEC Security Research for their responsible disclosure of this issue.

Updated packages:

Red Hat Linux 7.1 

----------------------------------------------------------------------------
 
SRPMS: 
wu-ftpd-2.6.2-11.71.1.src.rpm
[ via FTP ] [ via HTTP ]     eaad5f7ffbf2399c13623da2c6ff4e83 
  
i386: 
wu-ftpd-2.6.2-11.71.1.i386.rpm
[ via FTP ] [ via HTTP ]     ecbd80d787844a3ab579e6058b0704c2 
  
Red Hat Linux 7.1 for iSeries 

--------------------------------------------------------------------------------
 
SRPMS: 
wu-ftpd-2.6.2-11.71.1.src.rpm
[ via FTP ] [ via HTTP ]     eaad5f7ffbf2399c13623da2c6ff4e83 
  
ppc: 
wu-ftpd-2.6.2-11.71.1.ppc.rpm
[ via FTP ] [ via HTTP ]     cf9324b0e936ffb3aa7a738f26108eb6 
  
Red Hat Linux 7.1 for pSeries 

--------------------------------------------------------------------------------
 
SRPMS: 
wu-ftpd-2.6.2-11.71.1.src.rpm
[ via FTP ] [ via HTTP ]     eaad5f7ffbf2399c13623da2c6ff4e83 
  
ppc: 
wu-ftpd-2.6.2-11.71.1.ppc.rpm
[ via FTP ] [ via HTTP ]     cf9324b0e936ffb3aa7a738f26108eb6 
  
Red Hat Linux 7.2 

--------------------------------------------------------------------------------
 
SRPMS: 
wu-ftpd-2.6.2-11.72.1.src.rpm
[ via FTP ] [ via HTTP ]     3f526a5e04806d71560c7357189c08fa 
  
i386: 
wu-ftpd-2.6.2-11.72.1.i386.rpm
[ via FTP ] [ via HTTP ]     22ce902ae1255927825bec7a6cbd9a68 
  
ia64: 
wu-ftpd-2.6.2-11.72.1.ia64.rpm
[ via FTP ] [ via HTTP ]     8587632893b8a74580b50cdf1a4923f6 
  
Red Hat Linux 7.3 

--------------------------------------------------------------------------------
 
SRPMS: 
wu-ftpd-2.6.2-11.73.1.src.rpm
[ via FTP ] [ via HTTP ]     a25b0c5c9575cfa2e18578b8ec30e7ab 
  
i386: 
wu-ftpd-2.6.2-11.73.1.i386.rpm
[ via FTP ] [ via HTTP ]     3c53df7e43666c6b1dfc6b9bbbe4da06 
  
Red Hat Linux 8.0 

--------------------------------------------------------------------------------
 
SRPMS: 
wu-ftpd-2.6.2-12.src.rpm
[ via FTP ] [ via HTTP ]     dca07c4e90f308b49f8ac6b8d463536f 
  
i386: 
wu-ftpd-2.6.2-12.i386.rpm
[ via FTP ] [ via HTTP ]     d7b8fc5c0f9c0938dbddcea76f8e1e22 
  

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains 
the desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0466
http://isec.pl/vulnerabilities/isec-0011-wu-ftpd.txt 

Keywords:

ftpd 

----------------------------------------------------------------------------
The listed packages are GPG signed by Red Hat, Inc. for security. Our 
key is available at:
http://www.redhat.com/solutions/security/news/publickey/#key 
You can verify each package and see who signed it with the following 
command:

rpm --checksig -v filename 

If you only wish to verify that each package has not been corrupted or 
tampered with, examine only the md5sum with the following command:

md5sum filename 

The Red Hat security contact is security@redhat.com. More contact details 
at http://www.redhat.com/solutions/security/news/contact.html 
 
Copyright © 2002 Red Hat, Inc. All rights reserved. Search by Google

[***** End Red Hat Security Advisory RHSA-2003:245-15 *****]

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