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Snort Rule Matching Backtrack Denial of Service Vulnerability
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Secunia Advisory:
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SA23716
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Release Date:
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2007-01-11
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Last Update:
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2007-01-17
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Popularity:
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10,208 views
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Critical:
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Less 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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| Software: | Snort 1.8.x
Snort 1.9.x
Snort 2.0.x
Snort 2.1.x
Snort 2.2.x
Snort 2.3.x
Snort 2.4.x
Snort 2.6.x
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| | CVE reference: | CVE-2006-6931
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Description:
Randy Smith, Christian Estan, and Somesh Jha have reported a vulnerability in Snort, which potentially can be exploited by malicious people to cause a DoS (Denial of Service).
The problem is that the rule matching algorithm of Snort can be exploited to perform numerous time-consuming operations, which may lead to a decreased or zero detection rate via a specially crafted packet.
The vulnerability is reported in version 2.4.3. Other versions may also be affected.
Solution:
Update to version 2.6.1 or later.
Provided and/or discovered by:
Randy Smith, Christian Estan, and Somesh Jha, University of Wisconsin-Madison
Changelog:
2007-01-17: Added CVE reference and included information on patched version in "Solution" section.
Original Advisory:
http://www.cs.wisc.edu/~smithr/pubs/acsac2006.pdf
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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10th Oct, 2008
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