(IBM Issues Fix for AIX) BIND DNS Query Port Entropy Weakness Lets Remote Users Spoof the System
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SecurityTracker Alert ID: 1020519 |
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SecurityTracker URL: http://securitytracker.com/id/1020519
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CVE Reference:
CVE-2008-1447
(Links to External Site)
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Date: Jul 18 2008
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Impact:
Modification of system information
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 9.x
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Description:
A vulnerability was reported in BIND. A remote user can spoof the system.
The domain name system (DNS) service does not use sufficiently random UDP sockets to process queries. A remote user can send specially crafted DNS queries and responses to the target service to spoof responses and insert records into the DNS cache. This may cause traffic to be redirected to arbitrary IP addresses specified by the remote user.
The vendor indicates that the vulnerability exists in the DNS protocol itself, rather than in any particular vendor's implementation.
Systems using BIND as a caching resolver are affected.
Some demonstration exploit code is available at:
http://www.caughq.org/exploits/CAU-EX-2008-0002.txt
http://www.caughq.org/exploits/CAU-EX-2008-0003.txt
Dan Kaminsky of IOActive reported this vulnerability.
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Impact:
A remote user can spoof the DNS service, causing traffic to be redirected to arbitrary hosts.
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Solution:
IBM has issued the following APARs:
AIX 5.2 TL10 IZ26667
AIX 5.3 TL6 IZ26668
AIX 5.3 TL7 IZ26669
AIX 5.3 TL8 IZ26670
AIX 6.1 TL0 IZ26671
AIX 6.1 TL1 IZ26672
The IBM advisories are available at:
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ26667
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ26668
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ26669
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ26670
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ26671
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ26672
[Editor's note: The IBM advisories were not publicly available at the time of this entry.]
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Vendor URL: www.isc.org/index.pl?/sw/bind/index.php (Links to External Site)
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Cause:
Randomization error
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Underlying OS:
UNIX (AIX)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Thu, 17 Jul 2008 22:41:35 -0400
Subject: IBM AIX
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AIX 5.2 TL10 IZ26667
AIX 5.3 TL6 IZ26668
AIX 5.3 TL7 IZ26669
AIX 5.3 TL8 IZ26670
AIX 6.1 TL0 IZ26671
AIX 6.1 TL1 IZ26672
CVE-2008-1447
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