preprocessors/spp_frag3.c in Sourcefire Snort before 2.8.1 does not
properly identify packet fragments that have dissimilar TTL values,
which allows remote attackers to bypass detection rules by using a
different TTL for each fragment.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
IDEFENSE:20080521 Multiple Vendor Snort IP Fragment TTL Evasion Vulnerability
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