Title:

Oracle WebLogic Node Manager allows arbitrary configuration via UNC path

Release Date:

October 12, 2010

Patch Date:

January 18, 2011
Oracle – Critical Patch Update for January 2011

Firewall rules should also be implemented to restrict the use of UNC paths on the Node Manager server as well as restricting access to the Node Manager service to only trusted sources.

Reported Date:

May 20, 2010 – Submitted to CERT/CC

Vendor:

Oracle Corporation

Systems Affected:

Oracle WebLogic Node Manager version 10.3.3 (and earlier versions)

Summary:

Oracle WebLogic Node Manager 10.3.3 and earlier versions contain a remote file inclusion vulnerability. This vulnerability could allow a remote attacker to execute arbitrary commands on an affected system.

Vendor Status:

Oracle is aware of the issue, and has resolved it in their January 2011 security patches.

Exploit Availability:

No exploit is required to target this vulnerability. An unauthenticated attacker can connect to the Node Manager service and set the configuration file location to a remote UNC path controlled by the attacker. The configuration file specifies the location of the password file, which can also be located on a UNC path controlled by the attacker. After the attacker has authenticated with their own password file they can use built in Node Manager features to execute commands on the Node Manager server.

Researcher(s):

Carl Livitt of Bishop Fox

Vulnerability Details:

Oracle WebLogic Node Manager 10.3.3 and earlier versions contain a remote file inclusion vulnerability. This vulnerability could allow a remote attacker to execute arbitrary commands on an affected system.

Node Manager is a WebLogic Server utility that enables you to start, shut down, and restart Administration Server and Managed Server instances from a remote location. An unauthenticated attacker has the ability to set the configuration file via UNC path.

An unauthenticated attacker can connect to the Node Manager service and set the configuration file location to a remote UNC path controlled by the attacker. The configuration file specifies the location of the password file, which can also be located on UNC path controlled by the attacker. After the attacker has authenticated with their own password file they can use built in Node Manager features to execute commands on the Node Manager server.

Workaround:

Firewall rules should also be implemented to restrict the use of UNC paths on the Node Manager server as well as restricting access to the Node Manager service to only trusted sources.

References:

  • CERT VU: 924300: Vulnerability Note VU#924300 – Oracle WebLogic Node Manager allows arbitrary configuration via UNC path
  • Security Focus – ID: 43931: Oracle WebLogic Server Node Manager UNC Path Remote Security Vulnerability
  • OSVDB ID: 68954: Oracle WebLogic Node Manager Service Arbitrary File Access
  • SA41822: Oracle WebLogic Node Manager File Inclusion Vulnerability