CVE-2017-10620
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 · uneditedJuniper Networks Junos OS on SRX series devices do not verify the HTTPS server certificate before downloading anti-virus updates. This may allow a man-in-the-middle attacker to inject bogus signatures to cause service disruptions or make the device not detect certain types of attacks. Affected Junos OS releases are: 12.1X46 prior to 12.1X46-D71; 12.3X48 prior to 12.3X48-D55; 15.1X49 prior to 15.1X49-D110;
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 confidenceJuniper SRX devices fail to validate HTTPS server certificates when downloading anti-virus signature updates, allowing a man-in-the-middle attacker to intercept the connection and inject malicious signatures. This bypasses the security mechanism and can cause the device to miss detection of attacks or experience service disruptions.
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= 12.1x46= 12.3x48= 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
- Network
- Complexity
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/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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Determine the installed Junos OS versionRun 'show version' on the SRX device CLI to retrieve the exact Junos version stringAffected if The version matches or falls within the 12.1X46, 12.3X48, or 15.1X49 release families (prior to the fixed D71, D55, and D110 updates respectively)
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Verify if anti-virus signature updates are configuredCheck the security package configuration using 'show security antivirus status' or 'show configuration security antivirus'Affected if Anti-virus is enabled and configured to receive automatic signature updates from Juniper's update servers
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Confirm the device fetches AV updates over HTTPSReview the antivirus configuration for the update URL using 'show configuration security antivirus | display set'Affected if The update source is configured to use HTTPS (the vulnerable condition), or the configuration does not explicitly enforce certificate validation
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Check if the device has any custom trust anchor configured for AV updatesInspect the security certificate configuration using 'show configuration security certificates' and look for CA profiles bound to the AV update processAffected if No explicit certificate authority or trust anchor is configured for validating the AV update server's certificate (the default vulnerable behavior)
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Inspect the JSA/NSM logs for recent AV update activityReview logs for 'antivirus' or 'security-package' events using 'show log messages | match antivirus'Affected if The device has performed recent AV updates, indicating the vulnerable code path is being executed
The device is affected if it runs a vulnerable Junos version in the 12.1X46, 12.3X48, or 15.1X49 families AND has anti-virus signature updates enabled, since the vulnerability only manifests when the device fetches AV signatures without proper certificate validation.
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 fixed versions (12.1X46-D71, 12.3X48-D55, 15.1X49-D110 or later) which implement proper certificate validation for anti-virus updates.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2017-10620 — 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-2017-10620 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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