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Oracle Database Server "extproc" Two Vulnerabilities
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Secunia Advisory:
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SA9339
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Release Date:
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2003-07-24
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Last Update:
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2005-11-16
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Popularity:
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7,923 views
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Critical:
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Moderately critical
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Impact:
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System access
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Where:
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From local network
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Solution Status:
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Partial Fix
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| Software: | Oracle 7.x
Oracle Database 8.x
Oracle9i Database Enterprise Edition
Oracle9i Database Standard Edition
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Description:
Two vulnerabilities have been reported in Oracle Database Server, which can be exploited by malicious people to compromise a vulnerable system.
1) Requests to load and execute external libraries using "extproc" are not properly validated. This can be exploited by malicious users to execute any function in any DLL on the file system via the Oracle Listener, without requiring authentication.
2) A boundary error was introduced in the patch for vulnerability #1. This can be exploited to cause a stack-based buffer overflow when attempts to load external libraries via in the "CREATE LIBRARY" and "CREATE ANY LIBRARY" SQL functions are logged. Users who has been granted access to these functions could possibly exploit this to execute arbitrary code on the database server.
David Litchfield made a demonstration at the BlackHat Briefings proving that this can be exploited by anonymous users.
The vulnerabilities have been reported in versions 7, 8i and 9i.
Solution:
Oracle has released patches:
Version 9.2.0.3 on all platforms except Windows apply patch 2988114
Version 9.2.0.3 on Windows apply patch 2973634
Version 9.2.0.3 on IBM OS/390 apply patch 2990322
Version 9.2.0.2 on all platforms except Windows apply patch 2988086
The patch for version 9.2.0.2 on Windows will be available in August 2003.
Version 9.2.0.2 on IBM OS/390 apply patch 2990370
Patches are available from:
http://metalink.oracle.com/
NOTE: The vendor has reported that patches are not available for versions 9.0.1.4, 8.1.7.4, 8.1.6.x, 8.1.5.x, 8.0.6.3, 8.0.5.x, and 7.3.x due to architectural constraints.
Provided and/or discovered by:
David Litchfield and Chris Anley, Next Generation Security Software
Changelog:
2003-08-07: Updated due to information which indicates that this can be exploited by anonymous users.
2005-11-16: Updated advisory with information that patches are not available for certain Oracle versions.
Original Advisory:
http://otn.oracle.com/deploy/security/pdf/2003alert57.pdf
http://www.nextgenss.com/advisories/ora-extproc.txt
http://www.ngssoftware.com/advisories/oraplsextproc.txt
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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2nd Dec, 2008
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