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AUSCERT External Security Bulletin Redistribution
ESB-2009.1489.2
Security Vulnerability in Solaris SCTP (Stream Control Transmission
Protocol (see sctp(7P)) and SDP (Sockets Direct Protocol driver (see
sdp(7D)) sockets May Allow Unprivileged Users to Cause a
Denial of Service (DoS) Condition
9 November 2009
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AusCERT Security Bulletin Summary
---------------------------------
Product: OpenSolaris
Publisher: Sun Microsystems
Operating System: OpenSolaris
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2009-3899
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-266388-1
Revision History: November 9 2009: Added CVE Reference
November 6 2009: Initial Release
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Security Vulnerability in Solaris SCTP (Stream Control Transmission
Protocol (see sctp(7P)) and SDP (Sockets Direct Protocol driver (see
sdp(7D)) sockets May Allow Unprivileged Users to Cause a Denial of
Service (DoS) Condition
_________________________________________________________________
Category : Security
Release Phase : Resolved
Bug Id : 6873752
Product : OpenSolaris
Date of Resolved Release : 04-Nov-2009
A security vulnerability in SCTP (Stream Control Transmission Protocol
(see sctp(7P))) and SDP (Sockets Direct Protocol driver (see sdp(7D)))
sockets:
1. Impact
A security vulnerability in SCTP (Stream Control Transmission Protocol
(see sctp(7P))) and SDP (Sockets Direct Protocol driver (see sdp(7D)))
sockets may allow local unprivileged users to leak kernel memory,
thereby causing a Denial of Service (DoS) condition.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* OpenSolaris based upon builds snv_106 through snv_126
x86 Platform
* OpenSolaris based upon builds snv_106 through snv_126
Note 1: Solaris 8, 9 and 10 are not impacted by this issue.
Note 2: 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
3. Symptoms
A saved crash dump of the kernel generated on unresponsive systems may
show a large number of buffers being used by SCTP or SDP. The
following command can be run to find buffer usage information from the
operating system crash dump files:
$ echo ::kmastat -m | mdb # | egrep "sdp_conn_cache|sctp_conn_cache"
Where # is the numerical suffix of the two operating system crash dump
files. For example, if the suffix is "3", mdb infers that it should
examine the files "unix.3" and "vmcore.3".
sctp_conn_cache 2264 1 7 0M 1 0
sdp_conn_cache 5032 6379 6379 49M 6379 0
The value in the third column indicates the number of buffers in use.
If the value is much larger than the expected number of active
connections, then a Denial of Service may have occurred.
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
* OpenSolaris based upon builds snv_127 or later
x86 Platform
* OpenSolaris based upon builds snv_127 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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