2015-10 Security Bulletin: Junos: J-Web in vSRX-Series: A remote attacker can cause a denial of service to vSRX when J-Web is enabled causing the vSRX instance to reboot. (CVE-2014-6451)

Product Affected:J-Web in vSRX-Series

Problem:A remote attacker may exploit a flaw in the J-Web service to perform a denial of service attack against the vSRX system causing the system to spontaneously reboot.This issue is assigned CVE-2014-6451.

Solution:The following software releases have been updated to resolve this specific issue: Junos OS 15.1X49-D20 and all subsequent releases.This issue was found during internal product security testing.Juniper SIRT is not aware of any malicious exploitation of this vulnerability.No other Juniper Networks products or platforms are affected by this issue.This issue is being tracked as PR 1085414 and is 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 services on vSRX. Use access lists or firewall filters to limit access to the vSRX administrative ports only from trusted hosts. Restrict access to only highly trusted administrators.

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: 2015-10-14: Initial publication

Related Links: CVSS Score:7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Risk Level:High

Risk Assessment:Information for how Juniper Networks uses CVSS can be found at KB16446 “Common Vulnerability Scoring System (CVSS) and Juniper’s Security Advisories”

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