CVE-2017-2341
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 insufficient authentication vulnerability on platforms where Junos OS instances are run in a virtualized environment, may allow unprivileged users on the Junos OS instance to gain access to the host operating environment, and thus escalate privileges. Affected releases are Juniper Networks Junos OS 14.1X53 prior to 14.1X53-D40 on QFX5110, QFX5200, QFX10002, QFX10008, QFX10016, EX4600 and NFX250; 15.1 prior to 15.1R5 on EX4600; 15.1X49 prior to 15.1X49-D70 on vSRX, SRX1500, SRX4100, SRX4200; 16.1 prior to 16.1R2 on EX4600, ACX5000 series. This issue does not affect vMX. No other Juniper Networks products or platforms are affected by this issue.
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 confidenceInsufficient authentication in virtualized Junos OS instances allows unprivileged guest users to escape the VM and access the host operating environment, achieving privilege escalation. The vulnerability exists in the virtualization layer that separates the Junos OS guest from the underlying hypervisor/host.
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= 14.1x53= 14.1x53-d10= 14.1x53-d15= 14.1x53-d25= 14.1x53-d26= 14.1x53-d27= 14.1x53-d30= 14.1x53-d35= 15.1= 15.1x49= 16.1CVSS 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
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/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 Junos versionRun 'show version' or 'show version detail' on the Junos device and locate the base version number (for example, 14.1X53, 15.1, 15.1X49, or 16.1)Affected if The installed version matches any of these exact versions: 14.1X53, 14.1X53-D10, 14.1X53-D15, 14.1X53-D25, 14.1X53-D26, 14.1X53-D27, 14.1X53-D30, 14.1X53-D35, 15.1, 15.1X49, or 16.1
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Confirm virtualized Junos deploymentDetermine if this Junos instance is running as a virtual machine guest rather than on bare metal. Check for hypervisor indicators in 'show version' output (such as virtual platform identifiers) or consult virtualization infrastructure documentation to confirm this is a VM-based deploymentAffected if The Junos OS is running as a virtualized guest instance on a hypervisor, not on dedicated hardware
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Assess user privilege exposureReview access controls and determine whether unprivileged or guest users have shell or CLI access to the virtualized Junos instanceAffected if Untrusted or unprivileged guest users can access the virtualized Junos OS CLI or shell
If the device runs a Junos version matching exactly 14.1X53 (any D-variant), 15.1, 15.1X49, or 16.1 in a virtualized VM environment with any untrusted user access, it is likely affected by this VM escape vulnerability.
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 to the specified minimum versions (14.1X53-D40, 15.1R5, 15.1X49-D70, 16.1R2) for affected platforms. Until patched, minimize exposure of untrusted users to virtualized Junos instances.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-2341 — 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-2017-2341 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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- Version or environment caveats, and links to real fixes
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