The Edge SWG providing user authentication intermediary services must require users to reauthenticate when organization-defined circumstances or situations require reauthentication.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-279216	SRG-NET-000337-ALG-000096	SYME-00-009200	SV-279216r1170672_rule	2025-12-16	1

Description
Without reauthentication, users may access resources or perform tasks for which they do not have authorization. In addition to the reauthentication requirements associated with session locks, organizations may require reauthentication of individuals and/or devices in other situations, including (but not limited to) the following circumstances: - When authenticators change. - When roles change. - When security categories of information systems change. - When the execution of privileged functions occurs. - After a fixed period of time. - Periodically. Within the DOD, the minimum circumstances requiring reauthentication are privilege escalation and role changes. This requirement only applies to components for which this is specific to the function of the device or has the concept of user authentication (e.g., VPN or ALG capability). This does not apply to authentication for the purpose of configuring the device itself (i.e., device management). Satisfies: SRG-NET-000337-ALG-000096, SRG-NET-000344-ALG-000098

Description

Without reauthentication, users may access resources or perform tasks for which they do not have authorization. In addition to the reauthentication requirements associated with session locks, organizations may require reauthentication of individuals and/or devices in other situations, including (but not limited to) the following circumstances: - When authenticators change. - When roles change. - When security categories of information systems change. - When the execution of privileged functions occurs. - After a fixed period of time. - Periodically. Within the DOD, the minimum circumstances requiring reauthentication are privilege escalation and role changes. This requirement only applies to components for which this is specific to the function of the device or has the concept of user authentication (e.g., VPN or ALG capability). This does not apply to authentication for the purpose of configuring the device itself (i.e., device management). Satisfies: SRG-NET-000337-ALG-000096, SRG-NET-000344-ALG-000098

ℹ️ Check
1. In the Edge SWG Web UI, navigate to the Configuration tab. 2. Go to "Authentication Reams and Domains". 3. Select the "CAC/Certificate" realm. 4. Under "Advanced Setting", click "Show". If the setting "Use the same refresh time for all" is not checked, this is a finding. If it is checked, and the "Surrogate refresh time" is not set to at least "600 seconds", this is a finding.

✔️ Fix
1. In the Edge SWG Web UI, navigate to the Configuration tab. 2. Go to "Authentication Reams and Domains". 3. Select the "CAC/Certificate" realm. 4. Under "Advanced Setting", click "Show". 5. Check the setting "Use the same refresh time for all". 6. Under "Surrogate refresh time" set it to at least "600 seconds", but the site policies may require less. 7. Click "Apply and Save".