CVE-2018-0053
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 · uneditedAn authentication bypass vulnerability in the initial boot sequence of Juniper Networks Junos OS on vSRX Series may allow an attacker to gain full control of the system without authentication when the system is initially booted up. Affected releases are Juniper Networks Junos OS: 15.1X49 versions prior to 15.1X49-D30 on vSRX.
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 confidenceAuthentication bypass vulnerability in the initial boot sequence of Juniper Networks Junos OS on vSRX Series allows an attacker to gain full control of the system without authentication when the system is initially booted up. This affects versions prior to 15.1X49-D30.
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= 15.1x49CVSS 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
- Physical
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:P/AC:L/PR:N/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 checksWork through these to decide whether this CVE applies to you.
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Identify if the device is a vSRX virtual applianceRun 'show version' or 'system inventory' and look for 'vSRX' or 'Virtual' in the hardware or model informationAffected if The device is a vSRX virtual instance (physical SRX devices are not affected)
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Determine the exact Junos OS versionRun 'show version' and note the full version string (e.g., 15.1X49-D10, 15.1X49-D20, etc.)Affected if The version is 15.1X49 and is earlier than 15.1X49-D30 (versions prior to D30 are affected)
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Check system uptime and boot historyRun 'show system uptime' or 'show system boot-messages' to determine when the device was last rebootedAffected if The device has been recently rebooted or is in initial deployment phase (the vulnerability affects the initial boot sequence)
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Verify if initial setup wizard has been completedCheck configuration for 'system services web-management' or look for evidence of initial admin account setup via 'show configuration system login'Affected if The initial boot sequence and configuration wizard have not been completed (device is in factory-default or first-boot state)
The device is affected if it is a vSRX virtual appliance running Junos OS version 15.1X49-D10 through 15.1X49-D20 (any version prior to 15.1X49-D30) and is in or recently completed its initial boot sequence.
Generated from the published advisory. Verify against your own configuration.
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 dataUpgrade Junos OS on vSRX to version 15.1X49-D30 or later to remediate this vulnerability. Ensure the initial boot sequence occurs in a secure, isolated network environment until the patch is applied.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-0053 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2018-0053 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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