Product Affected

This issue can affect any product or platform running Junos OS with J-Web enabled.
Medium
CVSSv2: 5.0 (AV:N/AC:L/Au:N/C:P/I:N/A:N)

Problem

Multiple vulnerabilities exist in J-Web error handling that may lead to cross site scripting (XSS) issues or crash the J-Web service. The cross site scripting vulnerability may allow a remote network based attacker to steal sensitive information such as session credentials from an administrative user or perform administrative actions through an administrative user's browser.
This issue was discovered by an external security researcher.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue has been assigned CVE-2014-6447 .

Solution

The following software releases have been updated to resolve these specific issues: Junos OS 12.1X44-D45, 12.1X46-D30, 12.1X47-D20, 12.3R8, 12.3X48-D10, 13.1R5, 13.2R6, 13.3R4, 14.1R3, 14.1X53-D10, 14.2R1, 15.1R1, and all subsequent releases.

This issue is being tracked as PR 959990 and is visible on the Customer Support website.

KB16765 [juniper.net] - "In which releases are vulnerabilities fixed?" describes which release vulnerabilities are fixed as per our End of Engineering and End of Life support policies.

How to obtain fixed software:
Security vulnerabilities in Junos are fixed in the next available Maintenance Release of each supported Junos version. In some cases, a Maintenance Release is not planned to be available in an appropriate time-frame. For these cases, Service Releases are made available in order to be more timely. Security Advisory and Security Notices will indicate which Maintenance and Service Releases contain fixes for the issues described. Upon request to JTAC, customers will be provided download instructions for a Service Release. Although Juniper does not provide formal Release Note documentation for a Service Release, a list of "PRs fixed" can be provided on request.

Workaround

Disable J-Web or to reduce the risks of exploitation due to this vulnerability limit J-Web access to only trusted hosts.

Severity Assessment

Information for how Juniper Networks uses CVSS can be found at KB 16446 [juniper.net] "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Modification History

Modification History:

2015-07-08: Initial publication
2015-07-14: Added 14.1X53-D10 to list of fixed releases.

Related Information

Acknowledgements

The Juniper SIRT would like to acknowledge and thank Kyle Lovett for responsibly reporting this vulnerability.