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klzgrad / 00-README.txt

Last active April 19, 2024 09:26

DNS compression pointer mutation

	$ LD_PRELOAD=$PWD/sendmsg.so dig twitter.com @8.8.8.8
	;; Warning: Message parser reports malformed message packet. <-- malformed 因为把压缩指针当作域名一部分了
	;; Question section mismatch: got twitter.com/RESERVED0/CLASS256

	; <<>> DiG 9.9.5-3-Ubuntu <<>> twitter.com @8.8.8.8
	;; global options: +cmd
	;; Got answer:
	;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44722
	;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1