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Linux Kernel Netfilter TCP Option Matching Denial of Service Vulnerability
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Secunia Advisory:
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SA11980
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Release Date:
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2004-07-01
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Last Update:
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2005-05-12
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Popularity:
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14,214 views
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Critical:
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Moderately critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| OS: | Linux Kernel 2.6.x
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
Adam Osuchowski and Tomasz Dubinski have reported a vulnerability in the Linux kernel, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to the use of an incorrect variable type within the "tcp_find_option()" function of the netfilter subsystem. This can be exploited by sending a specially crafted TCP packet, which causes the kernel to enter an infinite loop and consume all available CPU resources.
Successful exploitation requires that iptables is used with rules matching TCP options ("--tcp-option").
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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