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JunosOperating system · Juniper

CVE-2019-0057

HIGH · 7.8 CVSS v3.1 Published 2019-10-09
Fix available
A fix is available. Upgrade to after 18.1 or later.
See remediation →
80/100
Remediation priority · High
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
An improper authorization weakness in Juniper Networks Junos OS allows a local authenticated attacker to bypass regular security controls to access the Junos Device Manager (JDM) application and take control of the system. This issue affects: Juniper Networks Junos OS versions prior to 18.2R1, 18.2X75-D5.

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

This is a local authorization bypass vulnerability in Juniper Junos OS where an authenticated attacker can circumvent normal security controls to access the Junos Device Manager (JDM) application, achieving full system compromise. The weakness stems from improper authorization checks in the JDM component.

MitigationUpgrade Junos OS to version 18.2R1 or later (or 18.2X75-D5 for branch platforms) to remediate this vulnerability. Prior to upgrade, schedule a maintenance window and ensure backup configurations are available.

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:<= 18.1= 18.2= 18.2x75

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
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/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. Determine installed Junos OS version
    Run 'show version' or 'show version detail' on the device CLI to obtain the exact Junos OS release version
    Affected if Version is 18.1 or earlier, exactly 18.2, or exactly 18.2x75 (any build)
  2. Confirm JDM component is present
    Check if Junos Device Manager (JDM) is installed by looking for jdm or related packages in 'show version' output or by examining system configuration
    Affected if JDM is installed and running on the device
  3. Verify JDM authorization configuration
    Review JDM configuration and user role assignments using 'show configuration' commands related to system services or JDM settings
    Affected if User authentication is configured for JDM access (any non-default auth settings)

A system is affected if it runs Junos OS version 18.1 or earlier, 18.2, or 18.2x75 and has JDM enabled, allowing authenticated attackers to bypass authorization controls.

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 18.1
Interim mitigation

Upgrade Junos OS to version 18.2R1 or later (or 18.2X75-D5 for branch platforms) to remediate this vulnerability. Prior to upgrade, schedule a maintenance window and ensure backup configurations are available.

Fix this in Junos Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing6.0 h
  • Review / QA3.0 h
19.0 hours of engineering $3,320
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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-2019-0057 in production — separate from our analysis above.

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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