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Linux Kernel 2.2 - Predictable TCP Initial Sequence Number

🗓️ 27 Sep 1999 00:00:00Reported by Stealth S. KrahmerType 
exploitpack
 exploitpack
👁 14 Views

Vulnerability in Linux Kernel allows guessing TCP sequence numbers, leading to spoofed sessions.

Code
source: https://www.securityfocus.com/bid/670/info

A vulnerability in the Linux kernel allows remote users to guess the initial sequence number of TCP sessions. This can be used to create spoofed TCP sessions bypassing some types of IP based access controls.

The function 'secure_tcp_sequence_number' in the file 'drivers/char/random.c' at line 1684 is used to generate the initial sequence number. It used the MD4 hash with a set of inputs to generate the new ISN. 

https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/19522.tar.gz

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