TUCoPS :: HP/UX :: ciacm032.txt

HP-UX Security Vulnerability with wu-ftpd 2.6

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M-032: HP-UX Security Vulnerability with wu-ftpd 2.6

[Hewlett-Packard Company Security Bulletin: #0180]

January 23, 2002 19:00 GMT
 PROBLEM:           Format string vulnerability in wu-ftp 2.6.1 and
                    earlier, when running with debug mode enabled, allows
                    remote attackers to execute arbitrary commands via a
                    malformed argument that is recorded in a PASV port
 PLATFORM:          HP9000 Series 700/800 running HP-UX releases 11.0 and
 DAMAGE:            A remote user may execute arbitrary code on the
 SOLUTION:          Download and install the latest WEB upgrade.
 VULNERABILITY      The risk is HIGH. The vulnerability and exploits have
 ASSESSMENT:        been discussed in public forums.

   CIAC BULLETIN:          http://www.ciac.org/ciac/bulletins/m-032.shtml

[***** Start Hewlett-Packard Company Security Bulletin: #0180 *****]

   Originally issued: 22 Jan. 2002

The information in the following Security Bulletin should be acted
upon as soon as possible.  Hewlett-Packard Company will not be
liable for any consequences to any customer resulting from customer's
failure to fully implement instructions in this Security Bulletin as
soon as possible.

PROBLEM:  Security vulnerability in WU-FTPD 2.6., Format String.
          CVE identifier: CAN-2001-0187

PLATFORM: HP9000 Series 700/800 running HP-UX releases 11.0 and 11.11.

DAMAGE:   A remote user may execute arbitrary code on the server.

SOLUTION: Use the latest WEB upgrade which will upgrade WU-FTPD to
          version 2.6 (rev b01.002)

MANUAL ACTIONS: Download and install the latest WEB upgrade.

AVAILABILITY: It is available now for 11.0 and 11.11.

A. Background
   There is a format string vulnerability in wu-ftpd.
   The Common Vulnerabilities and Exposures (CVE) group
   has assigned the identifier: CAN-2001-0187



B. Fixing the problem
   To determine if wu-ftpd version 2.6 is installed on a system:

     what /usr/lbin/ftpd | grep wuftpd-2.6

   If version 2.6 IS installed, then apply the latest web
   upgrade now. Registration for the download is necessary:


   and search on "wu-ftpd" (without the quotes)



   If revision 2.6 is NOT installed, then make sure you have
   installed the current patches for HP Security Bulletin
   "HPSBUX0107-162 Security Vulnerability in ftpd".

C. To subscribe to automatically receive future NEW HP Security
   Bulletins from the HP IT Resource Center via electronic
   mail, do the following:

   Use your browser to get to the HP IT Resource Center page


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    For information on the Security Patch Check tool, see:

    The security patch matrix is also available via anonymous


    On the "Support Information Digest Main" page:
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 D. To report new security vulnerabilities, send email to


    Please encrypt any exploit information using the
    security-alert PGP key, available from your local key
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    of 'get key' (no quotes) to security-alert@hp.com.

    Permission is granted for copying and circulating this
    Bulletin to Hewlett-Packard (HP) customers (or the Internet
    community) for the purpose of alerting them to problems,
    if and only if, the Bulletin is not edited or changed in
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    Any other use of this information is prohibited. HP is not
    liable for any misuse of this information by any third party.
[***** End Hewlett-Packard Company Security Bulletin: #0180 *****]

CIAC wishes to acknowledge the contributions of Hewlett-Packard Company for
the information contained in this bulletin.
CIAC services are available to DOE, DOE Contractors, and the NIH. CIAC can
be contacted at:

    Voice:          +1 925-422-8193 (7 x 24)
    FAX:            +1 925-423-8002
    STU-III:        +1 925-423-2604
    E-mail:          ciac@llnl.gov
    World Wide Web:  http://www.ciac.org/
                     (same machine -- either one will work)
    Anonymous FTP:   ftp.ciac.org
                     (same machine -- either one will work)

This document was prepared as an account of work sponsored by an agency of
the United States Government. Neither the United States Government nor the
University of California nor any of their employees, makes any warranty,
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