Product Affected:vMX (Virtual MX Series router)Problem:
An incorrect permissions vulnerability in vMX may allow local unprivileged users on a host system read access to vMX or vPFE images and obtain sensitive information contained in them such as private cryptographic keys.
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 has been assigned CVE-2016-4924.

Solution:This issue has been resolved in vMX 14.1R8, 15.1F6, 16.1 and all subsequent releases.This issue is being tracked as PR 1129051 and is visible on the Customer Support website.
Workaround:Limit access to only trusted users on the host machine where vMX is deployed.
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:
2016-10-12: Initial publication

Related Links:CVSS Score:8.4 (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N)
Risk Level:High
Acknowledgements:

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