STIGQter: STIG Summary: VMware vSphere 8.0 vCenter Appliance Secure Token Service (STS) Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 01 Jul 2026:

The vCenter STS service must limit the number of maximum concurrent connections permitted.

DISA Rule

SV-258970r960735_rule

Vulnerability Number

V-258970

Group Title

SRG-APP-000001-AS-000001

Rule Version

VCST-80-000001

Severity

CAT II

CCI(s)

• CCI-000054 - Limit the number of concurrent sessions for each organization-defined account and/or account type to an organization-defined number.
• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.

Weight

10

Fix Recommendation

Navigate to and open:

/usr/lib/vmware-sso/vmware-sts/conf/server.xml

Navigate to the <Executor> node with the name of tomcatThreadPool and configure with the value "maxThreads="150"".

Note: The <Executor> node should be configured similar to the following:

<Executor maxThreads="150"
minSpareThreads="50"
name="tomcatThreadPool"
namePrefix="tomcat-http--"/>

Restart the service with the following command:

# vmon-cli --restart sts

Check Contents

At the command prompt, run the following command:

# xmllint --xpath '/Server/Service/Executor[@name="tomcatThreadPool"]/@maxThreads' /usr/lib/vmware-sso/vmware-sts/conf/server.xml

Expected result:

maxThreads="150"

If the output does not match the expected result, this is a finding.

Vulnerability Number

V-258970

Documentable

False

Rule Version

VCST-80-000001

Severity Override Guidance

At the command prompt, run the following command:

# xmllint --xpath '/Server/Service/Executor[@name="tomcatThreadPool"]/@maxThreads' /usr/lib/vmware-sso/vmware-sts/conf/server.xml

Expected result:

maxThreads="150"

If the output does not match the expected result, this is a finding.

Check Content Reference

M

Target Key

5567