![]() Microsoft acknowledged it and paid the researcher through its vulnerability reward program, but hasn't issued a fix. WithSecure originally shared its discovery of the Office 365 vulnerability with Microsoft in January 2022. How to Set Up Microsoft AutoUpdate Open any of Microsoft Office applications such as Word, Excel, PowerPoint, or Outlook. The discovery comes shortly after researchers discovered hackers were chaining two new zero-day Exchange exploits to target Microsoft Exchange servers. If someone steals your email archives or backups, and accesses your email server, they can use this technique to sidestep the encryption. For enterprises, this highlights that just because your emails are encrypted, doesn't mean they're safe from threat actors. This means if an attacker obtains many emails they can infer the contents of the messages by analyzing the location and frequency of patterns in the messages and matching these to other emails. OME uses the electronic codebook (ECB) block cipher, which leaks structural information about the message. I don't know if I should do anything at this point or if there is a quick fix. I do have a folder : Library>Application Support>MAU 2.0 >Microsoft AutoUpdate.app (v4.31) and am on v 16.45. To open the program, double-click Microsoft AutoUpdate in. "The flaw enables a hacker to infer the contents of encrypted messages." I have MS Office 365 for mac and get the enclosed pic that Microsoft Auto update cannot be opened, though it also says MSFT is up to date. Microsoft AutoUpdate should be turned off In the search bar of Finder, type Microsoft auto-update. "A researcher from cloud and endpoint protection provider WithSecure has discovered an unpatchable flaw in Microsoft Office 365 Message Encryption," reports VentureBeat. Microsoft AutoUpdate is a feature of Windows 10 that helps keep your computer up to date with the latest security and software updates.
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