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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux Kernel IPv6 Netfilter Connection Tracking Flaw Lets Remote Users Deny Service
SecurityTracker Alert ID:  1027235
SecurityTracker URL:  http://securitytracker.com/id/1027235
CVE Reference:   CVE-2012-2744   (Links to External Site)
Date:  Jul 10 2012
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.6.x
Description:   A vulnerability was reported in the Linux Kernel. A remote user can cause denial of service conditions.

A remote user can send specially crafted packets to trigger a null pointer dereference in nf_ct_frag6_reasm() and cause the target system to crash.

Systems using IPv6 and also having the nf_conntrack_ipv6 kernel module loaded are affected.

An anonymous contributor reported this vulnerability via Beyond Security's SecuriTeam Secure Disclosure program.

Impact:   A remote user can cause the target system to crash.
Solution:   The vendor has issued a source code fix, available at:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=9e2dcf72023d1447f09c47d77c99b0c49659e5ce

Vendor URL:  www.kernel.org/ (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jul 10 2012 (Red Hat Issues Fix) Linux Kernel IPv6 Netfilter Connection Tracking Flaw Lets Remote Users Deny Service   (bugzilla@redhat.com)
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Jul 24 2012 (Red Hat Issues Fix) Linux Kernel IPv6 Netfilter Connection Tracking Flaw Lets Remote Users Deny Service   (bugzilla@redhat.com)
Red Hat has issued a fix Red Hat Enterprise Linux 6.0 Extended Update Support.
Jul 31 2012 (Red Hat Issues Fix) Linux Kernel IPv6 Netfilter Connection Tracking Flaw Lets Remote Users Deny Service   (bugzilla@redhat.com)
Red Hat has issued a fix for Red Hat Enterprise Linux 6.2.
Aug 8 2012 (Red Hat Issues Fix) Linux Kernel IPv6 Netfilter Connection Tracking Flaw Lets Remote Users Deny Service   (bugzilla@redhat.com)
Red Hat has issued a fix for Red Hat Enterprise Linux 6.1.



 Source Message Contents



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