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Vigil@nce: Oracle Database, privilege elevation via DBMS_JVM/DBMS_JAVA

February 2010 by Vigil@nce

SYNTHESIS OF THE VULNERABILITY

An attacker, authenticated on an Oracle database, can call procedures of DBMS_JVM_EXP_PERMS and DBMS_JAVA, in order to execute commands with system privileges.

Severity: 2/4

Consequences: administrator access/rights, privileged access/rights

Provenance: user account

Means of attack: no proof of concept, no attack

Ability of attacker: expert (4/4)

Confidence: confirmed by the editor (5/5)

Diffusion of the vulnerable configuration: high (3/3)

Creation date: 08/02/2010

IMPACTED PRODUCTS

- Oracle Database

DESCRIPTION OF THE VULNERABILITY

The DBMS_JVM_EXP_PERMS package is used during Oracle updates. The DBMS_JVM_EXP_PERMS.IMPORT_JVM_PERMS procedure changes Java privileges of the user.

The DBMS_JAVA package creates and manipulates Java applications from SQL. The DBMS_JAVA.SET_OUTPUT_TO_JAVA procedure defines a method to call when a Java application writes on System.out/err.

By combining DBMS_JVM_EXP_PERMS.IMPORT_JVM_PERMS and DBMS_JAVA.SET_OUTPUT_TO_JAVA, an attacker can elevate his privileges and execute a shell command.

An attacker, authenticated on an Oracle database, can thus execute commands with system privileges.

CHARACTERISTICS

Identifiers: BID-38115, VIGILANCE-VUL-9414

http://vigilance.fr/vulnerability/O...




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