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Oracle Database Buffer overflow vulnerabilities in procedures of package
DBMS_CAPTURE_ADM_INTERNAL (DB09)

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

Affected versions: Oracle Database Server versions 9iR1, 9iR2 and 10gR1

Risk level: Medium

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

Credits:  This vulnerability was discovered and researched by Esteban
Mart=EDnez Fay=F3 of Application Security Inc.

Details:
Oracle Database Server provides the DBMS_CAPTURE_ADM_INTERNAL package
that is used internally by the Streams Change Data Capture component.
This package contains the procedures CREATE_CAPTURE, ALTER_CAPTURE,
ABORT_TABLE_INSTANTIATION that are vulnerable to buffer overflow attacks.

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

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

Workaround:
Restrict access to the SYS.DBMS_CAPTURE_ADM_INTERNAL 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 
http://www.appsecinc.com/resources/alerts/oracle 

- --
_____________________________________________
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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