Remote Code Execution on J-Web

A user with low privilege (such as read only access) may get complete administrative access. The vulnerability is limited to only users with valid, authenticated login credentials.

New builds of Junos OS software are available from Juniper. As a workaround disable J-Web.

Juniper Junos could allow a remote authenticated attacker to execute arbitrary commands on the system, caused by the failure to restrict access to /jsdm/ajax/port.php. If J-Web is enabled, an attacker could send specially-crafted data to execute arbitrary OS commands on the system with root privileges.

Junos OS 10.4, 11.4, 12.1, 12.2 and 12.3.

Check the OS build.

• http://kb.juniper.net/JSA10560
• http://www.securityfocus.com/bid/62305

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Updated on 2015-03-25