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Snort Fragmented IP Packets TTL Security Bypass
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Secunia Advisory:
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SA30348
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Release Date:
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2008-05-22
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Critical:
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Less critical
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Impact:
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Security Bypass
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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 2.6.x
Snort 2.8.x
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| | CVE reference: | CVE-2008-1804 (Secunia mirror)
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Description:
A vulnerability has been reported in Snort, which can be exploited by malicious people to bypass certain security restrictions.
The vulnerability is caused due to an error in the processing of fragmented IP packets. This can be exploited to bypass Snort rules by sending fragmented IP packets with an overly large TTL (Time To Live) difference between fragments.
The vulnerability is reported in versions 2.6 and 2.8. Prior versions may also be affected.
Solution:
Update to version 2.8.1.
Provided and/or discovered by:
Silvio Cesare, reported via iDefense
Original Advisory:
iDefense:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=701
Extended Solution:
The "Extended Solution" section is available for Secunia customers only. Request a trial and get access to the Secunia Customer Area and Extended Secunia advisories.
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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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2 Related Secunia Security Advisories
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1. Snort DCE/RPC Preprocessor Buffer Overflow
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2. Snort Rule Matching Backtrack Denial of Service Vulnerability
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Send Feedback to Secunia
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If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
Ideas, suggestions, and other feedback are most welcome.
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