CVE-2016-1268
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 · uneditedThe administrative web services interface in Juniper ScreenOS before 6.3.0r21 allows remote attackers to cause a denial of service (reboot) via a crafted SSL packet.
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 confidenceA denial of service vulnerability in Juniper ScreenOS allows remote attackers to cause device reboot by sending a crafted SSL packet to the administrative web services interface. The vulnerability affects versions prior to 6.3.0r21.
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= 6.3.0CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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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Confirm device runs Juniper ScreenOSAccess device CLI and run 'get system information' or check the startup banner. ScreenOS devices show 'ScreenOS' in the prompt or banner, unlike Junos-based devices.Affected if Device runs ScreenOS firmware (not Junos)
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Check installed ScreenOS versionRun 'get system information' or 'show system' in the ScreenOS CLI. Note the exact version number displayed (for example, 6.3.0r15, 6.2.0r13, etc.).Affected if Version is 6.3.0 or any version lower than 6.3.0r21 (for example, 6.2.x, 6.1.x, or 6.3.0r1 through 6.3.0r20)
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Verify administrative web interface is enabledRun 'get web' or 'show web configuration' in the CLI. Check if web management is enabled (output shows 'Web management: enabled' or similar).Affected if Web-based administrative interface is enabled on the device
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Confirm web services are accessible on management interfaceCheck interface configuration with 'get interface' and verify the management IP/port bindings. Attempt a local connection to port 443 or 8443 if accessible, or review firewall policies allowing HTTPS to the device.Affected if HTTPS administrative interface is reachable from an untrusted network (any IP outside trusted management subnets)
Device is affected if it runs any ScreenOS version below 6.3.0r21 AND has the administrative web interface enabled and accessible.
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 to Juniper ScreenOS 6.3.0r21 or later. Additionally, restrict access to the administrative web interface to trusted management networks only to reduce exposure.
- Consultation1.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-1268 — 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-2016-1268 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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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.
- 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