M-032: HP-UX Security Vulnerability with wu-ftpd 2.6 Privacy and Legal Notice

CIAC INFORMATION BULLETIN

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 assignment.
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: Download and install the latest WEB upgrade.

VULNERABILITY
ASSESSMENT:
The risk is HIGH. The vulnerability and exploits have been discussed in public forums.

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

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

--------------------------------------------------------------------
   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
          http://cve.mitre.org/cgi-bin/cvename.cgi?name=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


  http://www.securityfocus.com/bid/2296


  http://cve.mitre.org/cgi-bin/cvename.cgi?name=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:


   http://www.software.hp.com/


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


   or:


http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=WUFTPD26


   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
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   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:
    http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=B6834AA"


    The security patch matrix is also available via anonymous
    ftp:


    ftp.itrc.hp.com:~ftp/export/patches/hp-ux_patch_matrix


    On the "Support Information Digest Main" page:
    click on the "HP Security Bulletin Archive".



 D. To report new security vulnerabilities, send email to


    security-alert@hp.com


    Please encrypt any exploit information using the
    security-alert PGP key, available from your local key
    server, or by sending a message with a -subject- (not body)
    of 'get key' (no quotes) to security-alert@hp.com.


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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.
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