Linux Kernel CIFS Filesystem DNS Lookup Caching Bug Lets Local Users Poison the Cache
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SecurityTracker Alert ID: 1024241 |
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SecurityTracker URL: http://securitytracker.com/id?1024241
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CVE Reference:
CVE-2010-2524
(Links to External Site)
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Date: Jul 23 2010
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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): prior to 2.6.35-rc6
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Description:
A vulnerability was reported in the Linux Kernel. A local user can conduct DNS cache poisoning attacks.
A local user can exploit a flaw in the CIFS filesystem DNS lookup code to add a result record into a keyring via the add_key() function and invoke a DNS lookup to cache a malicious redirect.
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Impact:
A local user can conduct DNS cache poisoning attacks.
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Solution:
The vendor has issued a fix (2.6.35-rc6).
The source code fix is available at:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=4c0c03ca54f72fdd5912516ad0a23ec5cf01bda7
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Vendor URL: www.kernel.org/ (Links to External Site)
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Cause:
Access control error
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Underlying OS:
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: Fri, 23 Jul 2010 18:17:31 +0000
Subject: Linux Kernel
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http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=4c0c03ca54f72fdd5912516ad0a23ec5cf01bda7
> Fix the security problem in the CIFS filesystem DNS lookup code in which a
> malicious redirect could be installed by a random user by simply adding a
> result record into one of their keyrings with add_key() and then invoking a
> CIFS CFS lookup [CVE-2010-2524].
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