CVE-2020-24637
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 · uneditedTwo vulnerabilities in ArubaOS GRUB2 implementation allows for an attacker to bypass secureboot. Successful exploitation of this vulnerability this could lead to remote compromise of system integrity by allowing an attacker to load an untrusted or modified kernel in Aruba 9000 Gateway; Aruba 7000 Series Mobility Controllers; Aruba 7200 Series Mobility Controllers version(s): 2.1.0.1, 2.2.0.0 and below; 6.4.4.23, 6.5.4.17, 8.2.2.9, 8.3.0.13, 8.5.0.10, 8.6.0.5, 8.7.0.0 and below ; 6.4.4.23, 6.5.4.17, 8.2.2.9, 8.3.0.13, 8.5.0.10, 8.6.0.5, 8.7.0.0 and below.
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 confidenceTwo vulnerabilities in ArubaOS GRUB2 bootloader implementation allow attackers to bypass secureboot verification, enabling loading of untrusted or modified kernels. This compromises system integrity at the boot level, giving attackers persistent control over affected mobility controllers and gateways.
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< 8.5.0.11>= 8.6.0.0, < 8.6.0.6>= 8.7.0.0, < 8.7.1.0< 2.1.0.2>= 2.2.0.0, < 2.2.0.1CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/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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Identify installed ArubaOS versionExecute 'show version' or 'show boot-image' in the device CLI to retrieve the active OS versionAffected if The displayed version falls within < 8.5.0.11, OR >= 8.6.0.0 and < 8.6.0.6, OR >= 8.7.0.0 and < 8.7.1.0
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Identify installed SD-WAN versionExecute 'show version' or similar command in the SD-WAN appliance CLI to retrieve the software versionAffected if The displayed version falls within < 2.1.0.2, OR >= 2.2.0.0 and < 2.2.0.1
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Verify secureboot statusExecute 'show secureboot status' or 'show boot-config' in the device CLI to check if secureboot is currently enabledAffected if Secureboot is disabled or shows a bypass state (the vulnerability allows bypass when enabled, but is exploitable regardless of its state)
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Inspect bootloader integrityCompare the hash or signature of the GRUB2 bootloader files against known-good values from Aruba documentation, or run 'show boot-parameters' to list loaded bootloader configurationAffected if Bootloader files show unexpected modifications, unsigned entries, or unknown boot menu entries are present
A device is affected if it runs any ArubaOS version in the ranges (< 8.5.0.11, 8.6.0.0-8.6.0.5, or 8.7.0.0-8.7.0.9) or any SD-WAN version in the ranges (< 2.1.0.2 or 2.2.0.0-2.2.0.0) AND has GRUB2 bootloader with secureboot present in the system.
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 data2.1.0.22.2.0.18.5.0.11
Apply Aruba-provided patches for the specific affected versions (6.4.4.23+, 6.5.4.17+, 8.2.2.9+, 8.3.0.13+, 8.5.0.10+, 8.6.0.5+, 8.7.0.0+). Verify secureboot remains enabled post-patch and monitor for unauthorized bootloader modifications.
- Consultation8.0 h
- Implementation12.0 h
- Testing10.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-24637 — 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-2020-24637 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
- No weaponised exploit code, or anything meant to cause harm
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