CVE-2020-8781
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 · uneditedLack of input sanitization in UpdateRebootMgr service of ALEOS 4.11 and later allow an escalation to root from a low-privilege process.
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 confidenceLocal privilege escalation vulnerability in the UpdateRebootMgr service of ALEOS firmware versions 4.11 and later. The service lacks proper input sanitization, allowing a low-privilege local attacker to inject malicious input and execute code with root privileges.
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>= 4.11.0, < 4.14.0CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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 ALEOS firmware versionLog into the device web interface or CLI and locate the firmware version under System Information, Device Status, or About section. Alternatively, send an AT command such as 'AT&F' or check the boot log if accessible.Affected if The displayed firmware version is 4.11.0 or higher but lower than 4.14.0
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Confirm UpdateRebootMgr service presenceAccess the device's service or process list via CLI, SSH, or management interface. Look for a process named UpdateRebootMgr, UpdateManager, or similar reboot/update management service.Affected if The UpdateRebootMgr service is present and running on the device
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Verify local access vectorDetermine if unprivileged local users or processes can interact with the UpdateRebootMgr service. Check service permissions, ACLs, or whether the service accepts input from non-root users.Affected if Low-privilege local users or processes can send input to the UpdateRebootMgr service
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Check for available management interfacesReview whether the device management interface (web UI, CLI, or API) is accessible to untrusted users. Examine user accounts and their privilege levels defined on the device.Affected if Untrusted local users have access to device management or can interact with system services
A device is affected if it runs ALEOS firmware version 4.11.0 through 4.13.x and has the UpdateRebootMgr service accessible to low-privilege local users.
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 data4.14.0
Apply vendor-supplied firmware updates for ALEOS. If patches are unavailable, restrict local access to trusted personnel and disable or limit the UpdateRebootMgr service where possible.
- 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-2020-8781 — 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-2020-8781 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