Chrome to Block Policy-Abusing Extensions on Personal Devices
Chrome may soon stop one of the simplest tricks malware uses to seize control of your browser before it ever takes effect.
Google is building new browser protections to block extensions that abuse enterprise policies and change Chrome’s New Tab page or default search engine on personal computers. The feature is designed for unmanaged Windows and macOS devices, where malware often creates fake management policies that trick Chrome into treating the system as part of an organization.
The change, which was spotted and reported by BleepingComputer, is designed not to affect legitimate enterprise deployments, where IT administrators intentionally install and manage extensions across employee devices. Instead, it uses more robust detection logic on consumer systems, preventing attackers from abusing enterprise management mechanisms to gain persistent control over browser settings.
Hackers have learned a new trick
Central to this hack is a simple, useful feature employed by organizations on managed computers. IT teams often implement enterprise policies on managed devices that require the installation of certain Chrome extensions and prevent users from uninstalling them.
Hackers found a way to exploit the logic, effectively fooling Google Chrome into believing that a device running Chrome is part of a managed enterprise and, as a result, preventing the uninstallation of these extensions in an attempt to respect that enterprise policy.
The most interesting part is that it works even when users install the extensions themselves — a task that is often impossible on managed devices. Users are sometimes shown a “Managed by your organization” message even when they are using a personal computer.
Citing a post by Anunoy Ghosh, a Google employee, BleepingComputer noted that these policy-blocking extensions are used to hijack a user’s New Tab page or prevent them from changing their default search engine.
Advertisement
What is changing
Google is responding by targeting the technique rather than the extensions themselves.
Instead of trying to identify every malicious extension, Chrome is being updated to recognize when enterprise policies are being abused on personal devices.
The browser would first determine whether an organization actually manages the device. If it isn’t, Chrome would refuse policy-installed extensions that attempt to replace the New Tab page or change the default search engine.
Google is also looking beyond new infections. BleepingComputer further reports that Chrome may automatically remove extensions installed via policy once a device transitions from managed to unmanaged, preventing them from lingering after enterprise policies are no longer in effect.
More than a single browser fix
While extensions like these can cause inconvenience to users, they can also be used for so much more.
Because attackers love making their malware persist on a user’s device, that mechanism could serve as an easy way to keep malicious Chrome extensions active. Once in place, those extensions can continue to enforce unwanted browser settings, redirect searches, collect browsing data, or push users toward malicious websites.
The changes are still under development and not available in stable versions of Chrome. However, their existence adds to Chrome’s growing effort to secure one of the browser’s most attractive targets — extensions.
For users, the immediate effect will likely be subtle. They won’t browse the web differently, install extensions differently, or notice a dramatic new security feature after updating Chrome. But attackers would lose an easy way to keep unwanted extensions installed and browser settings hijacked.
Advertisement
The safeguard would not stop cybercriminals from targeting Chrome, but it could force them to use more sophisticated methods.
Also read: Google’s Chrome update test could move browser security patches to a twice-weekly schedule as AI tools uncover more vulnerabilities.
About Author
