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Oracle Database Buffer overflow vulnerability in procedure DBMS_AQADM_SYS.DBLINK_INFO
October 24, 2007
Risk Level: Medium
Affected versions:
Oracle Database Server versions 9iR1, 9iR2 (9.2.0.7 and previous patchsets) and 10gR1
Remote exploitable: Yes (Authentication to Database Server is needed)
Credits:
This vulnerability was discovered and researched by Esteban Martínez Fayó of AppSec, Inc.
Details:
Oracle Database Server provides the SYS.DBMS_AQADM_SYS package that is used internally by the SYS.DBMS_AQADM package to provide procedures to manage Oracle Streams Advanced Queuing (AQ) configuration and administration information. This package contains the procedure DBLINK_INFO which is vulnerable to buffer overflow attacks.
Impact:
Any Oracle database user with EXECUTE privilege on the package SYS.DBMS_AQADM_SYS can exploit this vulnerability. By default only SYSDBA users have the required privilege. 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 informed about this vulnerability on 2/22/2005 and a patch was released on 10/16/2007.
Workaround:
Restrict access to the SYS.DBMS_AQADM_SYS package.
Fix:
Apply Oracle Critical Patch Update October 2007 available at Oracle Metalink.
Links:
http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpuoct2007.html
http://www.appsecinc.com/resources/alerts/oracle/2007-08.shtml
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Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
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