The whitelist should only contain organizationally approved extensions. This is to prevent a user from accidently whitelisitng a malicious extension.
"Allows you to specify which extensions are not subject to the blacklist. A blacklist value of * means all extensions are blacklisted and users can only install extensions listed in the whitelist. By default, no extensions are whitelisted. If all extensions have been blacklisted by policy, then the whitelist policy can be used to allow specific extensions to be installed. Administrators should determine which extensions should be allowed to be installed by their users. If no extensions are whitelisted, then no extensions can be installed when combined with blacklisting all extensions" - Google Chrome Administrators Policy List
Universal method (Requires Chrome Browser v15 or later): 1. In the omnibox (address bar) type chrome://policy 2. If ExtensionInstallWhitelist is not displayed under the Policy Name column or it is not set to oiigbmnaadbkfbmpbfijlflahbdbdgdf or a list of administrator approved extension IDs, then this is a finding.
Windows method: 1. Start regedit 2. Navigate to HKLM\Software\Policies\Google\Chrome\ExtensionInstallWhitelist 3. If the ExtensionInstallWhitelist key does not exist or is not set to oiigbmnaadbkfbmpbfijlflahbdbdgdf or a list of administrator approved extension IDs, then this is a finding.
Fix Text (F-40164r1_fix)
Valid for Chrome Browser version 8 or later.
Windows registry: Key Path: HKLM\Software\Policies\Google\Chrome\ExtensionInstallWhitelist For each extension that is to whitelisted sequential keys must be created. The name of the keys are numeric going 1,2,3,etc. Value Name: 1 Value Type: String (REG_SZ) Value Data: oiigbmnaadbkfbmpbfijlflahbdbdgdf