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Oracle Database Buffer overflow vulnerabilities in procedure DBMS_REPCAT_UNTRUSTED.UNREGISTER_SNAPSHOT (DB07)
Jan 18, 2007 (Updated Jan 26, 2007)
Risk Level: Medium
Affected versions:
Oracle Database Server versions 9i and 10gR1
Remote exploitable: Yes (Authentication to Database Server is needed)
Credits:
This vulnerability was discovered and researched by Esteban Martínez Fayó 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
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