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Linux Syn Filter Evasion Vulnerability
There exists a vulnerability in the packet filter that may allow for attackers to evade certain rules if syn cookies are in use. When processing connection requests in syn-flood protection mode, filter rules for TCP packets with the syn flag set (connection requests) are not properly enforced. If an attacker can guess a valid syn cookie response, it may be possible for them to access services otherwise filtered for all connection requests. |
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