Note: This is an archival copy of Security Sun Alert 248026 as previously published on http://sunsolve.sun.com.
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1019875.1.
Article ID : 1019875.1
Article Type : Sun Alerts (SURE)
Last reviewed : 2009-01-29
Audience : PUBLIC
Copyright Notice: Copyright © 2010, Oracle Corporation and/or its affiliates.

Security Vulnerability in the Solaris IP(7p) Implementation, Related to Minor Number Allocation, may Lead to a Denial of Service (DoS) Condition

Category
Security

Release Phase
Resolved

Bug Id
6507173

Product
Solaris 8 Operating System
Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris

Date of Resolved Release
30-Jan-2009

Security vulnerability in the Solaris IP(7p) implementation, related to minor number allocation, may lead to a Denial of Service (DoS) condition:

1. Impact

Security vulnerability within the Solaris IP(7p) (Internet Protocol) implementation related to the allocation of minor numbers may allow a local unprivileged user to open a large number of sockets, thereby resulting in a Denial of Service (DoS) condition to 32-bit applications. Depending on the system configuration, this may in turn affect the system as a whole, for example it may prevent new logins from completing successfully.

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform
  • Solaris 8 without patch 116965-34
  • Solaris 9 without patch 114344-37
  • Solaris 10 without patch 138888-01
  • OpenSolaris based upon builds snv_01 through snv_81
x86 Platform
  • Solaris 8 without patch 116966-33
  • Solaris 9 without patch 119435-25
  • Solaris 10 without patch 138889-01
  • OpenSolaris based upon builds snv_01 through snv_81
Note 1: OpenSolaris distributions may include additional bug fixes above and beyond the build from which it was derived.  To determine the base build of OpenSolaris, the following command can be used:
    $ uname -v
    snv_86
Note 2:  This issue only impacts applications running in 32-bit mode. To determine if an application is running in 32-bit mode, use the file(1) command on the executable associated with the application, as in the following example:
    $file /usr/lib/inet/in.dhcpd
    /usr/lib/inet/in.dhcpd: ELF 32-bit MSB executable SPARC Version 1, dynamically linked, stripped
If the string "ELF 32-bit" is returned, it is a 32-bit application.

3. Symptoms

If the described issue occurs, users may not be able to login to the system and certain network services may fail. For example, on systems configured with NIS+(1), nis_cachemgr(1M) may fail with an error message similar to the following:
    nis_cachemgr: nis_cast: t_open: /dev/udp:Not enough space
Symptoms for other affected 32-bit applications will vary depending on the application.

4. Workaround

There is no workaround for this issue.  Please see the Resolution section below.

5. Resolution

This issue is addressed in the following releases:

SPARC Platform
  • Solaris 8 with patch 116965-34 or later
  • Solaris 9 with patch 114344-37 or later
  • Solaris 10 with patch 138888-01 or later
  • OpenSolaris based upon builds snv_82 or later
x86 Platform
  • Solaris 8 with patch 116966-33 or later
  • Solaris 9 with patch 119435-25 or later
  • Solaris 10 with patch 138889-01 or later
  • OpenSolaris based upon builds snv_82 or later
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 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved.

References

114344-37
138888-01
119435-25
138889-01
116965-34
116966-33





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