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2016-04 Security Bulletin: Junos: Multiple vulnerabilities in J-Web (CVE-2016-1261)

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Article ID: JSA10723 SECURITY_ADVISORIES Last Updated: 13 Apr 2016Version: 1.0
Product Affected:
This issue can affect any product or platform running Junos OS with J-Web enabled.
Problem:
Multiple vulnerabilities exist in J-Web input handling that may lead to cross-site request forgery (CSRF) issues or cause a denial of J-Web service (DoS). The cross-site request forgery vulnerabilities may allow malicious content on third party websites to launch unauthorized access and actions against J-Web via an administrative user's browser.

These issues were found during internal product security testing.

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

This set of issues has been assigned CVE-2016-1261.
Solution:
The following software releases have been updated to resolve this specific issue: Junos OS 12.1X44-D55, 12.1X46-D45, 12.1X47-D30, 12.3R11, 12.3X48-D30, 13.2X51-D40, 13.3R8, 14.1R6, 14.1X53-D30, 14.2R5, 15.1R3, 15.1X49-D20, and all subsequent releases.

These issues are being tracked as PRs 1085861, 1085470, 1085428, 1084495, and 1082543, and are visible on the Customer Support website.

KB16765 - "In which releases are vulnerabilities fixed?" describes which release vulnerabilities are fixed as per our End of Engineering and End of Life support policies.
Workaround:
Disable J-Web, or limit access to only trusted hosts which may not be compromised by cross-site attacks. For example, deploy jump hosts with no Internet access that use anti-scripting techniques to mitigate potential threats. Alternately, use a dedicated client and dedicated Web browser that is not used to access other sites.
Implementation:
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.

Modification History:
Modification History:

2016-04-13: Initial publication

CVSS Score:
7.1 (CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H)
Severity Level:
High
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
Acknowledgements:
 

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