CVE-2017-8031 is a medium-severity (CVSS 5.3) vulnerability in org.cloudfoundry.identity:cloudfoundry-identity-server. A fix is available for org.cloudfoundry.identity:cloudfoundry-identity-server — see the affected versions and patch details below.
Cloud Foundry UAA Denial of Service through client token revocation endpoint
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
org.cloudfoundry.identity:cloudfoundry-identity-server☕org.cloudfoundry.identity:cloudfoundry-identity-server☕org.cloudfoundry.identity:cloudfoundry-identity-serverReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
An issue was discovered in Cloud Foundry Foundation cf-release (all versions prior to v279) and UAA (30.x versions prior to 30.6, 45.x versions prior to 45.4, 52.x versions prior to 52.1). In some cases, the UAA allows an authenticated user for a particular client to revoke client tokens for other users on the same client. This occurs only if the client is using opaque tokens or JWT tokens validated using the check_token endpoint. A malicious actor could cause denial of service.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.cloudfoundry.identity:cloudfoundry-identity-server | ≥ 4.6.0&&< 4.7.1 | 4.7.1org.cloudfoundry.identity:cloudfoundry-identity-server:4.7.1 |
| ☕Maven | org.cloudfoundry.identity:cloudfoundry-identity-server | ≥ 4.0.0&&< 4.5.3 | 4.5.3org.cloudfoundry.identity:cloudfoundry-identity-server:4.5.3 |
| ☕Maven | org.cloudfoundry.identity:cloudfoundry-identity-server | all versions | 3.20.1org.cloudfoundry.identity:cloudfoundry-identity-server:3.20.1 |
Affected Products
cf-releasecloudfoundryuaa-releasecloudfoundryDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.cloudfoundry.identity:cloudfoundry-identity-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.cloudfoundry.identity:cloudfoundry-identity-server to 4.7.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-8031 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
Frequently Asked Questions
Is CVE-2017-8031 in your dependencies?
Find it across Maven, including transitive dependencies.