dbcve.org
JunosOperating system · Juniper

CVE-2016-1264

HIGH · 8.8 CVSS v3.0 Published 2016-04-15
Fix available
A fix is available. Upgrade to after 12.1x44 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Race condition in the Op command in Juniper Junos OS before 12.1X44-D55, 12.1X46 before 12.1X46-D40, 12.1X47 before 12.1X47-D25, 12.3 before 12.3R11, 12.3X48 before 12.3X48-D20, 12.3X50 before 12.3X50-D50, 13.2 before 13.2R8, 13.2X51 before 13.2X51-D39, 13.2X52 before 13.2X52-D30, 13.3 before 13.3R7, 14.1 before 14.1R6, 14.1X53 before 14.1X53-D30, 14.2 before 14.2R4, 15.1 before 15.1F2 or 15.1R2, 15.1X49 before 15.1X49-D10 or 15.1X49-D20, and 16.1 before 16.1R1 allows remote authenticated users to gain privileges via the URL option.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A race condition exists in the Op command in Juniper Junos OS that allows remote authenticated users to gain elevated privileges via the URL option. The vulnerability stems from improper synchronization in the Op command processing, enabling privilege escalation through a timing-based attack.

MitigationUpgrade Junos OS to a patched version (12.1X44-D55 or later, 12.1X46-D40 or later, 12.1X47-D25 or later, 12.3R11 or later, 12.3X48-D20 or later, 12.3X50-D50 or later, 13.2R8 or later, 13.2X51-D39 or later, 13.2X52-D30 or later, 13.3R7 or later, 14.1R6 or later, 14.1X53-D30 or later, 14.2R4 or later, 15.1F2/15.1R2 or later, 15.1X49-D10/D20 or later, or 16.1R1 or later).

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
JunosOperating system
Affected:<= 12.1x44= 12.1x46= 12.1x47= 12.3= 12.3x48= 12.3x50= 13.2= 13.2x51= 13.2x52= 13.3= 14.1= 14.1x53

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Junos OS version
    Run 'show version' or 'show version detail' on the Juniper device to obtain the installed Junos OS version number
    Affected if The installed version matches one of the affected versions: <= 12.1x44, 12.1x46, 12.1x47, 12.3, 12.3x48, 12.3x50, 13.2, 13.2x51, 13.2x52, 13.3, 14.1, or 14.1x53
  2. Verify Op command is accessible
    Check the configuration for Op script or Op command definitions using 'show configuration | match op' or reviewing the configuration under the [system scripts] hierarchy
    Affected if Op command functionality is defined or enabled in the configuration
  3. Confirm authenticated user access to Op feature
    Review user authentication and authorization settings using 'show configuration system login' and check for user class or permission assignments that include Op script execution rights
    Affected if Authenticated users exist with permissions to execute Op commands
  4. Check user privilege levels
    Use 'show configuration system login user <username>' to review assigned user class and privilege level for each account
    Affected if Any authenticated user has a privilege level that would allow Op command execution (typically operator, read-only, or super-user classes)

The environment is affected if the Junos version is one of the listed affected versions AND authenticated users have access to the Op command feature.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to a release after 12.1x44
Interim mitigation

Upgrade Junos OS to a patched version (12.1X44-D55 or later, 12.1X46-D40 or later, 12.1X47-D25 or later, 12.3R11 or later, 12.3X48-D20 or later, 12.3X50-D50 or later, 13.2R8 or later, 13.2X51-D39 or later, 13.2X52-D30 or later, 13.3R7 or later, 14.1R6 or later, 14.1X53-D30 or later, 14.2R4 or later, 15.1F2/15.1R2 or later, 15.1X49-D10/D20 or later, or 16.1R1 or later).

Fix this in Junos Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing8.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,800
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,080.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2016-1264 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2016-1264 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data