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Oracle PL/SQL Injection

Oracle PL/SQL Injection
Posted Aug 25, 2009
Authored by David Litchfield | Site ngssoftware.com

Oracle suffers from a PL/SQL injection vulnerability in REPCAT_RPC.VALIDATE_REMOTE_RC.

tags | advisory, sql injection
advisories | CVE-2009-1021
MD5 | 4b3c2d9430fa71e97390bb95e4d59f40

Oracle PL/SQL Injection

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Hey all,
The Oracle REPCAT_RPC.VALIDATE_REMOTE_RC function executes blocks of
anonymous PL/SQL that can be influenced by an attacker to execute arbitrary
PL/SQL. As this package is only accessible directly by SYS this flaw would
not normally present a risk. However, the REPCAT_RPC.VALIDATE_REMOTE_RC
function can be used as an auxiliary inject function to escalate privileges.
This is described in a paper I wrote in February 2007 after reporting the
issue but am only releasing now as the flaw has fixed by Oracle in their
July 2009 Critical Patch Update. This flaw documents the currently
unspecified flaw at
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-1021

The paper is available from
http://www.databasesecurity.com/oracle/plsql-injection-create-session.pdf

Please note that many of the techniques discussed in this paper have been
superceded by cursor injection
(http://www.databasesecurity.com/dbsec/cursor-injection.pdf) which was
written 3 days after.

Cheers,
David Litchfield
NGSSoftware Ltd
http://www.ngssoftware.com/

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