A lazy race condition in RPC allows an authenticated user to elevate privileges to take ownership of any file on the device. This can allow an attacker to read, delete, or modify any file on the system. If the attacker modifies the files that control authentication operations, the attacker can potentially gain root access.

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-2016-1267 .

The following software releases have been updated to resolve this specific issue: Junos OS 12.1X44-D55, 12.1X46-D40, 12.1X47-D25, 12.3R11, 12.3X48-D20, 13.2R8, 13.2X51-D39, 13.2X51-D40, 13.3R7, 14.1R6, 14.1X53-D30, 14.2R3-S4, 14.2R4, 15.1F2, 15.1R2, 15.1X49-D20, 16.1R1, and all subsequent releases.

This issue is being tracked as PR 1078027 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.

Methods which may reduce the risk for exploitation of this problem, but which do not resolve the underlying problem include:

• Disabling...
  
  • any existing Junos OS Op scripts or removing them from the environment.
  • JUNOScript administration to the system.
  • Netconf administration to the system.
  • XNM services.
• Only allow access to XNM, Netconf from trusted administrative networks and hosts.
• Only allow trusted accounts access to execuite Op scripts.
• Using administrative jump boxes with no internet access and employ anti-scripting techniques.
• In addition to the recommendations listed above, it is good security practice to limit the exploitable attack surface of critical infrastructure networking equipment. Use access lists or firewall filters to limit access to the devices as listed above.

2016-04-13: Initial publication
2017-03-05: Category restructure.

• KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories." [juniper.net]
• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• CVE-2016-1267: Lazy race condition in RPC allows an authenticated user to improperly elevate privileges