Oracle Buffer Overflow in DBMS_REPCAT_UNTRUSTED.UNREGISTER_SNAPSHOT

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Oracle Database Buffer overflow vulnerabilities in procedure
DBMS_REPCAT_UNTRUSTED.UNREGISTER_SNAPSHOT (DB07)

AppSecInc Team SHATTER Security Advisory
http://www.appsecinc.com/resources/alerts/oracle
Jan 18, 2007

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

Risk level: Medium

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_REPCAT_UNTRUSTED package that
can be used to administer a replicated environment.
This package contains the procedure UNREGISTER_SNAPSHOT which is
vulnerable to buffer overflow attacks.

Impact:
Any Oracle database user with EXECUTE privilege on the package
SYS.DBMS_REPCAT_UNTRUSTED 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 Oracle server process.

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

Workaround:
Restrict access to the SYS.DBMS_REPCAT_UNTRUSTED package.

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

Links:
http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpujan2007.html

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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