CVE-2017-8031

Name: CVE-2017-8031
Creator: NVD / NIST
Published: 2017-11-27T10:29:00.767+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.09%

Last modified Jun 17, 2026

CVE-2017-8031 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 1.09% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.09%

61.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cloudfoundry	Cf-Release	<= 278
Cloudfoundry	Uaa-Release	>= 30, < 30.6
Cloudfoundry	Uaa-Release	>= 45, < 45.4
Cloudfoundry	Uaa-Release	52

References

http://www.securityfocus.com/bid/101967Third Party Advisory, VDB Entry
https://www.cloudfoundry.org/cve-2017-8031/Issue Tracking, Third Party Advisory
http://www.securityfocus.com/bid/101967Third Party Advisory, VDB Entry
https://www.cloudfoundry.org/cve-2017-8031/Issue Tracking, Third Party Advisory

Timeline

Published: Nov 27, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-8031?

How severe is CVE-2017-8031?

CVE-2017-8031 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.09% probability of exploitation in the next 30 days.

How do I fix CVE-2017-8031?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-8031?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST