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AUSCERT External Security Bulletin Redistribution
ESB-2011.0732
Denial of service vulnerability in BIND
18 July 2011
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: BIND
Publisher: IBM
Operating System: AIX
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2010-3614 CVE-2010-3613
Reference: ASB-2010.0244
Original Bulletin:
http://aix.software.ibm.com/aix/efixes/security/bind9_advisory2.asc
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IBM SECURITY ADVISORY
First Issued: Fri Jul 15 12:45:23 CDT 2011
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/bind9_advisory2.asc
VULNERABILITY SUMMARY
VULNERABILITY: Denial of service vulnerability in BIND
PLATFORMS: AIX 5.3, 6.1, and 7.1 releases
SOLUTION: Apply the fix or workaround as described below.
THREAT: A remote attacker can cause a denial of service
CVE Number: CVE-2010-3614
CVE-2010-3613
Reboot required? NO
Workarounds? NO
DETAILED INFORMATION
I. DESCRIPTION
The security status of an NS RRset is not properly determined
during a DNSKEY algorithm rollover which can allow a remote
attacker to cause a denial of service.
Signed negative responses and corresponding RRSIG records in
the cache are not properly handled which can allow a remote
attacker to cause a denial of service.
Please see the following for more information:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3614
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3613
II. PLATFORM VULNERABILITY ASSESSMENT
Note: To use the following commands on VIOS you must first
execute:
oem_setup_env
To determine if your system is vulnerable, execute the following
command:
lslpp -L bos.net.tcp.client bos.net.tcp.server
The following fileset levels are vulnerable:
AIX Fileset Lower Level Upper Level
------------------------------------------------
bos.net.tcp.client 5.3.12.0 5.3.12.4
bos.net.tcp.server 5.3.12.0 5.3.12.2
bos.net.tcp.client 6.1.4.0 6.1.4.10
bos.net.tcp.server 6.1.4.0 6.1.4.8
bos.net.tcp.client 6.1.5.0 6.1.5.6
bos.net.tcp.server 6.1.5.0 6.1.5.5
bos.net.tcp.client 6.1.6.0 6.1.6.15
bos.net.tcp.server 6.1.6.0 6.1.6.15
bos.net.tcp.client 7.1.0.0 7.1.0.15
bos.net.tcp.server 7.1.0.0 7.1.0.15
III. SOLUTION
A. FIXES
Fixes are now available. The fixes can be downloaded from:
http://aix.software.ibm.com/aix/efixes/security/bind9_ifix2.tar
The links above are to a tar file containing this signed
advisory, fix packages, and PGP signatures for each package.
AIX Level VIOS Level Fix
------------------------------------------------------
5.3.12 IZ99391s00.110621.epkg.Z
6.1.4 2.1.2.0 IV01118s00.110530.epkg.Z
6.1.5 2.1.3.0 IV01118s00.110530.epkg.Z
6.1.6 2.2.0.0 IV01118s00.110530.epkg.Z
7.1.0 IV01119s03.110531.epkg.Z
To extract the fixes from the tar file:
tar xvf bind9_ifix2.tar
cd bind9_ifix2
Verify you have retrieved the fixes intact:
The checksums below were generated using the "csum -h SHA1"
(sha1sum) commands and are as follows:
csum -h SHA1 (sha1sum) filename
------------------------------------------------------------------
5d023b2235ca9d57d0fd130f7110645fa50f063a IZ99391s00.110621.epkg.Z
3823bb9d423cc37652d6d4e79254cdc0cb7ef7ca IV01118s00.110530.epkg.Z
7db3c55c4cbbadcd40c87cf31bd91f96debea362 IV01119s03.110531.epkg.Z
To verify the sums, use the text of this advisory as input to
csum or sha1sum. For example:
csum -h SHA1 -i bind9_advisory2.asc
sha1sum -c bind9_advisory2.asc
These sums should match exactly. The PGP signatures in the tar
file and on this advisory can also be used to verify the
integrity of the fixes. If the sums or signatures cannot be
confirmed, contact IBM AIX Security and describe the
discrepancy at the following addresses:
security-alert@austin.ibm.com
B. FIX INSTALLATION
IMPORTANT: If possible, it is recommended that a mksysb backup
of the system be created. Verify it is both bootable and
readable before proceeding.
Fix management documentation can be found at:
http://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html
To preview fix installation:
emgr -e fix_name -p # where fix_name is the name of the
# fix being previewed.
To install fix package:
emgr -e fix_name -X # where fix_name is the name of the
# fix being installed.
C. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR number Service pack date
--------------------------------------------------------
5.3.12 IV02022 10/21/11 sp5
6.1.4 IV02023 10/26/11 sp11
6.1.5 IV01118 10/21/11 sp7
6.1.6 IV02024 10/21/11 sp6
7.1.0 IV01119 11/16/11 sp4
Subscribe to the APARs here:
http://www.ibm.com/support/docview.wss?uid=isg1IV02022
http://www.ibm.com/support/docview.wss?uid=isg1IV02023
http://www.ibm.com/support/docview.wss?uid=isg1IV01118
http://www.ibm.com/support/docview.wss?uid=isg1IV02024
http://www.ibm.com/support/docview.wss?uid=isg1IV01119
By subscribing, you will receive periodic email alerting you
to the status of the APAR, and a link to download the service
pack when it becomes available.
IV. WORKAROUND
None
VI. CONTACT INFORMATION
If you would like to receive AIX Security Advisories via email,
please visit:
http://www.ibm.com/systems/support
and click on the "My notifications" link.
To view previously issued advisories, please visit:
http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd
Comments regarding the content of this announcement can be
directed to:
security-alert@austin.ibm.com
To obtain the PGP public key that can be used to communicate
securely with the AIX Security Team you can either:
A. Send an email with "get key" in the subject line to:
security-alert@austin.ibm.com
B. Download the key from our web page:
http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgpkey.txt
C. Download the key from a PGP Public Key Server. The key ID is:
0x28BFAA12
Please contact your local IBM AIX support center for any
assistance.
eServer is a trademark of International Business Machines
Corporation. IBM, AIX and pSeries are registered trademarks of
International Business Machines Corporation. All other trademarks
are property of their respective holders.
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