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#10 - Buffer overflow in procedure GENERATE_REPLICATION_SUPPORT of DBMS_REPCAT package
August 31, 2004
Credit: These vulnerabilities were researched and discovered by Esteban Martínez Fayó of Application Security, Inc.
Risk level: Medium
Details:
Oracle Database Server provides the DBMS_REPCAT package that can be used to administer and update the replication catalog and environment. This package contains a procedure GENERATE_REPLICATION_SUPPORT used to generate the triggers and packages needed to support replication for a specified object.
When this procedure is called with a long string in the "package_prefix" or "procedure_prefix" parameters a buffer overflow occurs.
To reproduce the overflow, execute the next PL/SQL:
BEGIN
DBMS_REPCAT.GENERATE_REPLICATION_SUPPORT ('aa', 'bb', 'TABLE', 'longstring','longstring', true, 'gg');
END;
Analysis:
This vulnerability can be exploited by members of EXECUTE_CATALOG_ROLE or SYSDBA roles and users granted execute permissions on DBMS_REPCAT package.
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 Fix:
Fixed in Patchset 4 (9.2.0.5). 10g Not vulnerable.
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