CVE-2020-5134
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 · uneditedA vulnerability in SonicOS allows an authenticated attacker to cause out-of-bound invalid file reference leads to a firewall crash. This vulnerability affected SonicOS Gen 6 version 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.
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 · moderate confidenceA denial-of-service vulnerability in SonicOS allows an authenticated attacker to trigger an out-of-bounds invalid file reference that causes the firewall to crash. The issue stems from insufficient bounds checking when processing file references in the affected SonicOS versions.
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<= 6.0.5.3>= 6.5.0.0, <= 6.5.1.11= 7.0.0.0<= 6.5.4.4CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 installed SonicOS versionAccess the firewall admin interface and navigate to System > Status or use the command 'show version' via CLI to retrieve the exact SonicOS version numberAffected if The version falls within these ranges: <= 6.0.5.3, >= 6.5.0.0 through <= 6.5.1.11, = 7.0.0.0 (for SonicOS); <= 6.5.4.4 (for SonicOSv)
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Confirm product typeVerify whether the appliance runs SonicOS or SonicOSv (virtual appliance) from the System Status page or CLI outputAffected if The product is SonicOSv with version <= 6.5.4.4 and the vulnerability applies to that specific product line
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Verify administrative access exposureReview firewall access control settings under Network > Interfaces or System > Administration to determine if the management interface is accessible from untrusted networksAffected if The admin interface is exposed to the internet or untrusted LAN segments, allowing authenticated attackers to reach the vulnerable code path
The environment is affected if the firewall runs a SonicOS or SonicOSv version matching the affected ranges AND the management interface is accessible to potential authenticated attackers.
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 dataApply vendor patches or upgrade to a patched SonicOS version beyond the affected releases (Gen 6 6.5.1.12/6.0.5.3, Gen 7 7.0.0.0, SonicOSv 6.5.4.v). Since exploitation requires authentication, also restrict administrative access to trusted personnel only.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-5134 — 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-2020-5134 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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