Re: Team SHATTER Security Advisory: Oracle Database Buffer Overflow in SYS.KUPF$FILE_INT.GET_FULL_FILENAME (DB11)

[security curmudgeon <jericho@xxxxxxxxxxxxx>]

Hi Team SHATTER,

Apologies for the very late reply, but I had a question regarding your 
advisory. I am CC'ing Oracle's security contact in hopes they can also 
reply with clarification.

: Oracle Database Buffer Overflow in SYS.KUPF$FILE_INT.GET_FULL_FILENAME (DB11)

: Details:
: Oracle Database Server provides the SYS.KUPF$FILE_INT package. This
: package contains the procedure GET_FULL_FILENAME which is vulnerable to
: buffer overflow attacks.
: 
: Impact:
: Any Oracle database user with EXECUTE privilege on the package
: SYS.KUPF$FILE_INT can exploit this vulnerability. By default, users
: granted EXECUTE_CATALOG_ROLE have the required privilege. Exploitation
: of this vulnerability allows an attacker to execute arbitrary code. It
: can also be exploited to cause DoS (Denial of service) killing the
: Oracle server process.

Cliff notes: SYS.KUPF$FILE_INT.GET_FULL_FILENAME remote overflow, "execute 
arbitrary code .. also .. cause DoS". CVE-2008-1820

http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpuapr2008.html

From the Oracle advisory:

DB11    Data Pump       Oracle Net      Execute on KUPF$FILE_INT        No      
4.0     Network Low     Single  None    None    Partial

Cliff notes: Confidentiality = None. Integrity = None. Availability = 
Partial.

Summary: Team SHATTER says this is a remote overflow that allows for the 
execution of arbitrary code (CVSS2 9.0). Oracle says this is a limited 
DoS condition (CVSS2 4.0). That is a big discrepancy.

Based on disclosure history, Team SHATTER has a higher confidence rating 
and is generally considered more trustworthy than Oracle. As a responsible 
security professional, I have to assume their research is accurate and 
their advisory should be taken more seriously than Oracle's.

Any input from either side to help clarify?

- security curmudgeon


p.s. Same exact question and CVSS2 scores for SYS.DBMS_AQJMS_INTERNAL 
(DB15), CVE-2008-1821, same Oracle CPU.