Note: This is an archival copy of Security Sun Alert 201704 as previously published on
Latest version of this security advisory is available from as Sun Alert 1001257.1.
Article ID : 1001257.1
Article Type : Sun Alerts (SURE)
Last reviewed : 2010-01-24
Audience : PUBLIC
Copyright Notice: Copyright © 2010, Oracle Corporation and/or its affiliates.

Sun Linux 5.0 Security Vulnerability in "wu-ftpd" May Allow Unauthorized Root Access


Release Phase

Bug Id

Date of Resolved Release


A security vulnerbility exists in the WU-FTPD version 2.6.2 (and earlier) FTP server daemon, as currently shipped with Sun Linux 5.0 (as version 2.6.1-20), which may allow a remote or local unprivileged user to gain unauthorized root access.

For more information on this issue, see the following:

Red Hat Advisory RHSA-2003:245-15 located at:

CVE CAN-2003-0466 located at:

iSEC Advisory isec-0011-wu-ftpd located at:

In addition, please see Sun Alert 56121 for Solaris.

Contributing Factors

This issue can occur in the following releases:

Sun Linux

  • Sun Linux 5.0 with wu-ftpd package version 2.6.1-20 or earlier

Note: The WU-FTPD FTP server is disabled by default.

The WU-FTPD FTP server version can be determined by running the following command:

    # rpm -q wu-ftpd


There are no predictable symptoms that would indicate the above described issues have been exploited.


Until patches can be applied, sites that have enabled the WU-FTPD "ftpd" daemon process, may wish to disable it by doing the following:

1. Edit the "/etc/xinetd.d/wu-ftpd" file and change the line "disable = no" to "disable = yes".

2. Make "xinetd" read the new configuration files by executing the following command:

    # kill -HUP `pgrep xinetd`


This issue is addressed in the following releases:

Sun Linux

  • Sun Linux 5.0 with wu-ftpd package version 2.6.2-11.72.1 or later

Sun Linux patches are available at:

Modification History
Date: 29-AUG-2003
  • State: Resolved
  • Updated Resolution section

Sun Linux 5.0

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