CloudformsApplication · Redhat
CVE-2018-10905
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 · uneditedCloudForms Management Engine (cfme) is vulnerable to an improper security setting in the dRuby component of CloudForms. An attacker with access to an unprivileged local shell could use this flaw to execute commands as a high privileged user.
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 confidenceCloudForms Management Engine contains an improper security setting in its dRuby distributed Ruby component. An attacker with local shell access can exploit this misconfiguration to execute arbitrary commands as a highly privileged user (likely the cfme service account or root).
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
CloudformsApplication
= 4.5= 4.6
Cloudforms Management EngineApplication
= 5.8= 5.9CVSS 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:3.0/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 installed CloudForms/ManageIQ versionRun command to check the installed package version, such as 'rpm -q cfme' or 'rpm -q manageiq' depending on the installation, or check the about page in the web UIAffected if The installed version matches 4.5, 4.6, 5.8, or 5.9 of Red Hat CloudForms or CloudForms Management Engine
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Verify dRuby service is runningCheck if the evm service or dRuby-related process is active by running 'systemctl status evm' or 'ps aux | grep druby'Affected if The dRuby component (evm service) is running and accessible
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Check dRuby bind address configurationExamine the dRuby configuration files or environment variables that control the bind address; look for settings like DRUBY_BIND_ADDR or similar in the configurationAffected if The dRuby service is bound to 0.0.0.0 or an external interface rather than localhost only (127.0.0.1)
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Inspect dRuby authentication settingsReview the dRuby configuration for authentication requirements; check if the service allows unauthenticated method callsAffected if Authentication is disabled or not required for dRuby communications
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Verify network listening portsRun 'netstat -tlnp' or 'ss -tlnp' and look for ports associated with the cfme/evm service, particularly the dRuby portAffected if The dRuby port is listening on all interfaces (0.0.0.0) rather than only localhost
You are affected if you are running version 4.5, 4.6, 5.8, or 5.9 AND the dRuby service is bound to a non-localhost address or has authentication disabled, allowing unprivileged local access.
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 dataRestrict dRuby to secure settings by binding to localhost only, enabling authentication, or disabling the service if not required; then verify the configuration prevents unprivileged local access.
Fix this in Cloudforms
Scoped from the published advisory
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 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 $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-10905 — 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-2018-10905 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
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