Title

McAfee VirusScan On-Access Scanner General Settings must be configured to block the connection when a threatened file is detected in a shared folder. (Cat II impact)

Discussion

Containment during a virus outbreak is crucial. Infected hosts may attempt to spread malware and will use every network path available to them when spreading that infection. By containing the system when a detection is found, the malware will be restricted to that one system. Likewise, if malware is detected in a shared folder, maintaining the connection between a system and the shared folder would allow the malware to spread. Placing temporary restrictions on network connectivity is an effective mitigation mechanism. These block connection settings will most often be used on a server housing shared folders and files, and will block the connection from any network user on a remote computer who attempts to read from, or write to, a threatened file in the shared folder. In addition, it will block the connection from any user on a remote computer who attempts to write an unwanted program to the computer. The connection will be unblocked after the specified amount of time, re-allowing access to the other shared files and folders, but will be re-blocked should those same file accesses be attempted.

Check Content

Access the local VirusScan console by clicking Start->All Programs->McAfee->VirusScan Console. On the menu bar, click Task->On-Access Scanner Properties. Select the General Settings. Under the Blocking tab, locate the "Block" label. Ensure the "Block the connection when a threat is detected in a shared folder" option is selected. Criteria: If the "Block the connection when a threat is detected in a shared folder" option is selected, this is not a finding. On the client machine, use the Windows Registry Editor to navigate to the following key: HKLM\Software\McAfee\ (32-bit) HKLM\Software\Wow6432Node\McAfee\ (64-bit) SystemCore\VSCore\On Access Scanner\BehaviourBlocking Criteria: If the value of VSIDBlock is 1, this is not a finding. If the value is 0, this is a finding.

Fix Text

Access the local VirusScan console by clicking Start->All Programs->McAfee->VirusScan Console. On the menu bar, click Task->On-Access Scanner Properties. Select the General Settings. Under the Blocking tab, locate the "Block" label. Select the "Block the connection when a threat is detected in a shared folder" option. Click OK to Save.

Additional Identifiers

Rule ID: SV-243392r722515_rule

Vulnerability ID: V-243392

Group Title: SRG-APP-000278

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.