CVE-2016-0896
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 · uneditedPivotal Cloud Foundry (PCF) Elastic Runtime before 1.6.34 and 1.7.x before 1.7.12 places 169.254.0.0/16 in the all_open Application Security Group, which might allow remote attackers to bypass intended network-connectivity restrictions by leveraging access to the 169.254.169.254 address.
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 confidencePivotal Cloud Foundry Elastic Runtime before 1.6.34 and 1.7.x before 1.7.12 includes the 169.254.0.0/16 CIDR block in the default 'all_open' Application Security Group. This range contains 169.254.169.254, the cloud provider metadata service endpoint. Attackers who compromise an application container can reach this metadata address to extract sensitive credential data, bypassing intended network isolation.
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<= 1.6.33= 1.7.0= 1.7.1= 1.7.2= 1.7.3= 1.7.4= 1.7.5= 1.7.6= 1.7.7= 1.7.8= 1.7.9= 1.7.10CVSS 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
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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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Determine installed Elastic Runtime versionUse the cf CLI to query the Elastic Runtime version: 'cf curl /v2/info' or check via Ops Manager product tile version. Alternatively, run 'cf plugins' to list installed plugins and check for Cloud Foundry version.Affected if Version is 1.6.33 or lower, or any version 1.7.0 through 1.7.10 inclusive.
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List all Application Security GroupsRun 'cf security-groups' to retrieve all security groups in the foundation.Affected if A security group named 'all_open' exists in the list.
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Inspect the all_open ASG configurationRun 'cf security-group all_open' to display the full configuration of the all_open security group. Look for entries containing '169.254.0.0/16' in the 'destination' field.Affected if The all_open security group includes the CIDR range 169.254.0.0/16 or specifically 169.254.169.254/32 in its destinations.
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Check default staging and running ASGsRun 'cf curl /v2/config/staging_security_groups' and 'cf curl /v2/config/running_security_groups' to see which ASGs are applied by default to staging and running containers.Affected if The all_open security group is listed as a default staging or running security group.
You are affected if your Elastic Runtime version is 1.6.33 or earlier, or between 1.7.0 and 1.7.10, AND the all_open ASG includes the 169.254.0.0/16 range in its destinations.
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 dataUpgrade PCF Elastic Runtime to version 1.6.34 or later, or 1.7.12 or later. Alternatively, create a restrictive default ASG that explicitly excludes the 169.254.0.0/16 range and block metadata service access at the infrastructure level.
- Consultation4.0 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-2016-0896 — 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-2016-0896 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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- 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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