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AUSCERT External Security Bulletin Redistribution
ESB-2006.0362 -- [Solaris]
Security Vulnerability in the Solaris 9 in.ftpd(1M) Server
May Allow Unauthorized Directory Access
29 May 2006
AusCERT Security Bulletin Summary
Publisher: Sun Microsystems
Operating System: Solaris 9
Impact: Inappropriate Access
CVE Names: CAN-2004-0148
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Sun(sm) Alert Notification
* Sun Alert ID: 102356
* Synopsis: Security Vulnerability in the Solaris 9 in.ftpd(1M)
Server May Allow Unauthorized Directory Access
* Category: Security
* Product: Solaris 9 Operating System
* BugIDs: 5012436
* Avoidance: Workaround
* State: Workaround
* Date Released: 18-May-2006
* Date Closed:
* Date Modified:
A security vulnerability in the Solaris 9 in.ftpd(1M) server may allow
local or remote unprivileged users to access directories outside of
their home directory or to log in with their $HOME directory set to
This issue is also described in CAN-2004-0148 at
2. Contributing Factors
This issue can occur in the following releases:
* Solaris 9
* Solaris 9
1. Solaris 8 and Solaris 10 are not affected by this issue.
2. This issue only affects systems configured as FTP servers with
either the 'restricted-uid' or 'restricted-gid' clause in the
To determine if the in.ftpd service is enabled on a system the
following command can be used:
$ ftp remote-host
Connected to remote-host.domain.com.
220 remote-host FTP server ready.
There are no predictable symptoms that would indicate the described
issue has been exploited.
To work around the described issue until patches can be applied,
disable the in.ftpd(1M) daemon with the following steps:
1. Edit the "/etc/inetd.conf" file and comment out the following line
by prepending the "#" symbol, as in the following example:
#ftp stream tcp6 nowait root /usr/sbin/in.ftpd in.ftpd
2. Send the inetd(1M) process a hangup signal (SIGHUP) to that inetd
will reread the inetd.conf configuration file:
# pkill -HUP inetd
This will disable in.ftpd(1M).
A final resolution is pending completion.
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
notification may only be used for the purposes contemplated by these
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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