(HP Issues Fix for HP-UX) BIND DNS Query Port Entropy Weakness Lets Remote Users Spoof the System
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SecurityTracker Alert ID: 1020517 |
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SecurityTracker URL: http://securitytracker.com/id/1020517
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CVE Reference:
CVE-2008-1447
(Links to External Site)
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Updated: Aug 9 2008
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Original Entry Date: Jul 17 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:
HP has issued a fix for HP-UX for BIND 9.2.0 and 9.3.2.
For B.11.11 running v9.2.0:
BIND920v11.depot with MD5 checksum F6999280DE19645EF86FF52083AACD72
For B.11.23 running v9.2.0:
Install PHNE_37865
For B.11.11, 11.23, or 11.31 running v9.3.2:
Install revision C.9.3.2.3.0 or subsequent
For B.11.11 running v8.1.2, upgrade to BIND v9.2.0 or BIND v9.3.2 and then apply the appropriate patch.
For all versions, remove "query-source port" and "query-source-v6 port" options in /etc/named.conf.
On August 9, 2008, HP warned that some customers are experiencing performance issues after applying the patches. HP is working on a resolution to this problem.
The HP advisory is available at:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01506861
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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 (HP/UX)
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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 09:34:11 -0400
Subject: http://www11.itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c01506861
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CVE-2008-1447
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