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AUSCERT External Security Bulletin Redistribution
ESB-2009.0111 -- [Solaris]
Security Vulnerability in the Solaris IP(7p) Implementation
may Lead to a Denial of Service
2 February 2009
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AusCERT Security Bulletin Summary
---------------------------------
Product: Solaris 8 Operating System
Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Denial of Service
Access: Existing Account
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-248026-1
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Solution Type: Sun Alert
Solution 248026 : Security Vulnerability in the Solaris IP(7p)
Implementation, Related to Minor Number Allocation, may Lead to a
Denial of Service (DoS) Condition
Bug ID: 6507173
Product
Solaris 8 Operating System
Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris
Date of Resolved Release: 30-Jan-2009
SA Document Body
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 Technical
Instruction ID 213557.
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
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