CVE-2016-1263
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 Junos OS before 12.1X46-D45, 12.1X46-D50, 12.1X47 before 12.1X47-D35, 12.3X48 before 12.3X48-D30, 13.3 before 13.3R9-S1, 14.1 before 14.1R7, 14.2 before 14.2R6, 15.1 before 15.1F2-S5, 15.1F4 before 15.1F4-S2, 15.1R before 15.1R2-S3, 15.1 before 15.1R3, and 15.1X49 before 15.1X49-D40 allow remote attackers to cause a denial of service (kernel crash) via a crafted UDP packet destined to the interface IP address of a 64-bit OS device.
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 Junos OS allows remote attackers to cause a kernel crash by sending a crafted UDP packet to the interface IP address of a 64-bit OS device. The vulnerability stems from improper handling of specifically crafted UDP traffic at the kernel level.
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= 12.1x47= 12.3x48= 13.3= 14.1= 14.2= 15.1= 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
- 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.
-
Identify the Junos OS versionRun the command 'show version' or 'show version detail' on the Juniper device to retrieve the installed Junos OS versionAffected if The installed version matches any of the following: <= 12.1x46, = 12.1x47, = 12.3x48, = 13.3, = 14.1, = 14.2, = 15.1, or = 15.1x49
-
Confirm the hardware platform is 64-bitRun 'show chassis hardware' or 'show system information' to identify the device model and architecture. The vulnerability specifically affects 64-bit Junos OS devicesAffected if The device runs a 64-bit Junos OS version from the affected list above
-
Verify interface IP configurationRun 'show interface terse' or 'show ip interface' to list all configured interface IP addresses. The attack vector requires sending UDP packets to these interface IPsAffected if Any interface has an assigned IP address and the device runs an affected Junos version
A device is affected if it runs any of the listed Junos versions (12.1x46 or lower, 12.1x47, 12.3x48, 13.3, 14.1, 14.2, 15.1, or 15.1x49) on a 64-bit platform and has interface IP addresses configured to receive UDP traffic
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 one of the patched versions (12.1X46-D45, 12.1X47-D35, 12.3X48-D30, 13.3R9-S1, 14.1R7, 14.2R6, 15.1F2-S5, 15.1F4-S2, 15.1R2-S3, 15.1R3, or 15.1X49-D40) or later. As an interim mitigation, consider filtering or rate-limiting unexpected UDP traffic destined to interface IP addresses at network perimeter devices.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-1263 — 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-2016-1263 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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