Note: This is an archival copy of Security Sun Alert 240327 as previously published on http://sunsolve.sun.com.
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1019510.1.
Article ID : 1019510.1
Article Type : Sun Alerts (SURE)
Last reviewed : 2008-08-12
Audience : PUBLIC
Copyright Notice: Copyright © 2010, Oracle Corporation and/or its affiliates.

A Security Vulnerability in the ftp Subsystem of Sun Java System Web Proxy Server 4.0 May Lead to a Denial of Service (DoS)

Category
Security

Release Phase
Resolved

Bug Id
6590476

Product
Sun Java System Web Proxy Server 4.0

Date of Resolved Release
12-Aug-2008

Security vulnerability in the FTP subsystem of Sun Java System Web Proxy Server 4.0

1. Impact

A Security vulnerability in the FTP subsystem of Sun Java System Web Proxy Server 4.0 may allow a local or remote unprivileged user to prevent the proxy server from accepting new connections, resulting in a Denial of Service (DoS) to the proxy server.

Sun acknowledges, with thanks, Joxean Koret for bringing this issue to our attention.

2. Contributing Factors

This issues can occur in the following releases:

SPARC Platform
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without Service Pack 6
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without patch 120981-14
x86 Platform
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without Service Pack 6
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without patch 120982-14
Linux
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without Service Pack 6
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without patch 120983-14
HP-UX
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without Service Pack 6
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without patch 123532-04
Windows
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without Service Pack 6
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without patch 126325-04
To determine the version of Sun Java System Web Proxy Sever, run the following command:
$ <ps_install>/bin/proxy/bin/proxyd -v
Sun Microsystems, Inc.
Sun Java System Web Proxy Server 4.0.6 B05/12/2007 13:24
(Where <ps_install> is the installation directory of the Proxy Server).

3. Symptoms

Should the described issue occur, Proxy server stops accepting new connections with the following error message in the proxy server instance's "access" log file:
[03/Mar/2008:02:10:35] failure (32372): HTTP3069: Error accepting
connection (PR_PROC_DESC_TABLE_FULL_ERROR: file descriptor table full)

4. Workaround

If this issue has been exploited on a server, it may be possible to recover from the Denial of Service (DoS) condition by restarting the server. This can be done by using the following command:
    $<ps_install>/<ps_instance/restart
(Where <ps_install> is the installation directory of the Proxy Server, and <ps_instance> is the Proxy Server instance directory).

5. Resolution

This issue is addressed in the following releases:

SPARC Platform
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 with Service Pack 6 or later
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 with patch 120981-14 or later
x86 Platform
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 with Service Pack 6 or later
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 with patch 120982-14 or later
Linux
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 with Service Pack 6 or later
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 with patch 120983-14 orlater
HP-UX
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 with Service Pack 6 or later
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 with patch 123532-04 or later
Windows
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 with Service Pack 6 or later
  • Sun Java System Web Proxy Server 4.0 through 4.0.5 without patch 126325-04 or later
Sun Java System Web Proxy Server 4.0.7 is available for download at:
https://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_SMI-Site/en_US/-/USD/ViewProductDetail-Start?ProductRef=SJPrxySrv-4.0.7-OTH-G-F@CDS-CDS_SMI


For more information on Security Sun Alerts, see 1009886.1.

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 such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements.

Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved.

References

120981-14
120982-14
120983-14
123532-04
126325-04





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