CVE-2017-4960 Cloud Foundry denial of service vulnerability

What is CVE-2017-4960?

CVE-2017-4960 is a high-severity denial of service vulnerability in Cloud Foundry Foundation Cloud Foundry release v247 - v252, UAA stand-alone release v3.9.0 - v3.11.0, UAA Bosh Release v21 - v26, published on 10 Mar 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Cloud Foundry release v247 through v252, UAA stand-alone release v3.9.0 through v3.11.0, and UAA Bosh Release v21 through v26. There is a potential to subject the UAA OAuth clients to a denial of service attack.

Which versions are affected by CVE-2017-4960?

4 open source packages ship an affected version, including org.cloudfoundry.identity:cloudfoundry-identity-server. It affects 3 products.

Products include Cloudfoundry Cloud Foundry Uaa Bosh, Pivotal Software Cloud Foundry, Pivotal Software Cloud Foundry Uaa.

How do I fix CVE-2017-4960?

Upgrade org.cloudfoundry.identity:cloudfoundry-identity-server to a fixed version for your release line: 3.9.8 or 3.12.0.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-4960 being exploited?

There is no known exploitation of CVE-2017-4960 in the wild and no public exploit code.

Other vulnerabilities in Cloud Foundry Foundation Cloud Foundry release v247 - v252, UAA stand-alone release v3.9.0 - v3.11.0, UAA Bosh Release v21 - v26

• CVE-2016-6637 Cloud Foundry vulnerable to Cross-Site Request Forgery Critical 9.6
• CVE-2017-4973 Cloud Foundry UAA Privilege Escalation High 8.8
• CVE-2016-4468 SQL injection in n/a High 8.8
• CVE-2016-6651 Privilege escalation in n/a High 8.8
• CVE-2016-3084 Cloud Foundry UAA reset password vulnerable to brute force attack High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-hxgw-7539-pv7r.