CVE-2016-1262
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, 12.1X47 before 12.1X47-D30, 12.1X48 before 12.3X48-D20, and 15.1X49 before 15.1X49-D30 on SRX series devices, when the Real Time Streaming Protocol Application Layer Gateway (RTSP ALG) is enabled, allow remote attackers to cause a denial of service (flowd crash) via a crafted RTSP 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 exists in Juniper SRX series devices running Junos OS versions prior to the fixed releases. When the Real Time Streaming Protocol Application Layer Gateway (RTSP ALG) is enabled, a remote attacker can send a crafted RTSP packet that causes the flowd process to crash, resulting in service disruption.
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= 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
- None
- Availability
- High
CVSS:3.0/AV:N/AC:H/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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Identify the Junos OS versionRun 'show version' or 'show system information' on the SRX device to retrieve the installed Junos OS versionAffected if The version is 12.1X46 or lower, exactly 12.1X47, exactly 12.3X48, or exactly 15.1X49
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Confirm RTSP ALG statusRun 'show security alg' to check whether the RTSP Application Layer Gateway is enabled, or review the configuration under the 'security alg rtsp' hierarchyAffected if RTSP ALG is listed as enabled or configured in the security settings
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Verify version against fixed releasesCompare your exact version string (including any sub-version like 12.1X46-D45) against the fixed releases: 12.1X46-D45 or later, 12.1X47-D30 or later, 12.3X48-D20 or later, or 15.1X49-D30 or laterAffected if Your version predates the fixed release for your branch or exactly matches the vulnerable versions listed
You are affected if your device runs a vulnerable Junos OS version AND has RTSP ALG enabled, allowing a remote attacker to crash the flowd process with a crafted RTSP packet.
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 dataDisable the RTSP ALG if not required, or upgrade to Junos OS versions 12.1X46-D45 or later, 12.1X47-D30 or later, 12.3X48-D20 or later, or 15.1X49-D30 or later as appropriate for the device.
- Consultation2.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-1262 — 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-2016-1262 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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