CVE-2015-5303
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 · uneditedThe TripleO Heat templates (tripleo-heat-templates), when deployed via the commandline interface, allow remote attackers to spoof OpenStack Networking metadata requests by leveraging knowledge of the default value of the NeutronMetadataProxySharedSecret parameter.
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 confidenceThe TripleO Heat templates contain a hardcoded default value for the NeutronMetadataProxySharedSecret parameter. When deployed via the CLI using these defaults, remote attackers can guess this secret and spoof OpenStack Networking metadata requests, potentially gaining unauthorized access to instance metadata.
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 dataall versionsCVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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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Locate TripleO Heat template configurationsFind the Heat template files (typically under /usr/share/openstack-tripleo-heat-templates or similar) that contain the NeutronMetadataProxySharedSecret parameter definitionAffected if The template files exist and contain a default value for NeutronMetadataProxySharedSecret
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Inspect the NeutronMetadataProxySharedSecret parameterExamine the parameter definition in the Heat templates to identify if a hardcoded default value is set for NeutronMetadataProxySharedSecretAffected if A static, predictable default value is defined in the parameter defaults rather than requiring user-supplied values
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Check deployment configurationReview the environment files or parameters used during the TripleO deployment to see what value was provided for NeutronMetadataProxySharedSecretAffected if The deployment used the template default value instead of a unique random secret
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Verify if secret was changed post-deploymentInspect the deployed Neutron configuration files (typically neutron.conf) on the undercloud or overcloud controllers for the metadata proxy secret valueAffected if The deployed configuration still contains the original hardcoded default value from the templates
A user is affected if TripleO Heat templates were deployed using the hardcoded default value for NeutronMetadataProxySharedSecret instead of a unique random secret.
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 dataReplace the default value of NeutronMetadataProxySharedSecret with a unique, random secret or make the parameter mandatory to be set by users during deployment rather than using a predictable default.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2015-5303 — 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-2015-5303 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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