[KB8090] Configure a policy to mitigate PrintNightmare exploits

Issue

• You need to configure your ESET product to mitigate PrintNightmare exploits
• Create a mitigation policy for ESET Endpoint for Windows
• Create a mitigation policy for ESET Server Security for Windows Server
• Create a mitigation policy for ESET Mail Security for Microsoft Exchange

Details

You can use policies from ESET PROTECT and ESET PROTECT On-Prem to block malicious use of the Print Spooler service. With ESET’s Host-Based Intrusion Prevention System (HIPS), a user can block spoolsv.exe from writing new DLLs to the driver folder (a necessary element of remote exploitation of the PrintNightmare vulnerability).

Read more about PrintNightmare.

Solution

Create a mitigation policy for ESET Endpoint for Windows

1. Open the ESET PROTECT Web Console.

2. Create a new policy and follow the steps up to step 4. Select ESET Endpoint for Windows from the Select product ... drop-down menu. 

3. Follow these steps starting from Step 3 to configure the policy.

4. When the new policy is created, before you proceed with assigning the policy, in the Rules row, click the drop-down menu next to Edit and change both settings to Prepend.

5. Go to Step 7 and assign the policy to the groups or separate client computers.

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Create a mitigation policy for ESET Server Security for Windows Server

1. Open the ESET PROTECT Web Console.

2. Create a new policy and follow the steps up to step 4. Select ESET Server Security for Windows Server (V6+) from the Select product ... drop-down menu.

3. Follow these steps starting from Step 3 to configure the policy.

4. When the new policy is created, before you proceed with assigning the policy, in the Rules row, click the drop-down menu next to Edit and change bothsettings to Prepend.

5. Go to Step 7 and assign the policy to the groups or separate client computers.

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Create a mitigation policy for ESET Mail Security for Microsoft Exchange

1. Open the ESET PROTECT Web Console.

2. Create a new policy and follow the steps up to step 4. Select ESET Mail Security for Microsoft Exchange (V6+) from the Select product ... drop-down menu.

3. Expand Computer, click HIPS and then click Edit next to Rules.

4. Follow these steps starting from Step 6 to configure the policy.

5. When the new policy is created, before you proceed with assigning the policy, in the Rules row, click the drop-down menu next to Edit and change bothsettings to Prepend.

6. Go to Step 7 and assign the policy to the groups or separate client computers.