Oracle Database Buffer overflow vulnerabilities in package DBMS_SNAP_INTERNAL

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Title: Oracle Database Buffer overflow vulnerabilities in package
DBMS_SNAP_INTERNAL

Risk Level: Medium

Affected versions:
Oracle Database Server versions 8i, 9i and 10gR1

Remote exploitable: Yes (Authentication to Database Server is needed)

Credits:
This vulnerability was discovered and researched by Esteban Martinez
Fayo of Application Security Inc.

Details:
Oracle Database Server provides the DBMS_SNAP_INTERNAL package that
contains procedures used internally by Oracle. Some procedures of this
package have the parameters SNAP_OWNER and SNAP_NAME. These parameters
are vulnerable to buffer overflow attacks.

Impact:
Any Oracle database user with EXECUTE privilege on the package
SYS.DBMS_SNAP_INTERNAL can exploit this vulnerability. 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.

Vendor Status:
Vendor was contacted and a patch was released.

Workaround:
Restrict access to the SYS.DBMS_SNAP_INTERNAL package.

Fix:
Apply Oracle Critical Patch Update April 2007 available at Oracle Metalink.

Links:
http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpuapr2007.html
http://www.appsecinc.com/resources/alerts/oracle/2007-07.shtml

Application Security, Inc.
www.appsecinc.com
AppSecInc is the leading provider of database security solutions for the
enterprise. AppSecInc products proactively secure enterprise
applications at more than 300 organizations around the world by
discovering, assessing, and protecting the database against rapidly
changing security threats. By securing data at its source, we enable
organizations to more confidently extend their business with customers,
partners and suppliers. Our security experts, combined with our strong
support team, deliver up-to-date application safeguards that minimize
risk and eliminate its impact on business.

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