Apple has patched a vulnerability in iCloud for Windows and iTunes for Windows that malicious actors had been exploiting to evade antivirus and endpoint detection and response systems as they attempted to infect machines with ransomware.
Specifically, the zero-day flaw was discovered in Bonjour - a mechanism for delivering future updates and also for helping devices, apps and services discover each other. Bonjour comes packaged with iTunes for Windows machines, which for the foreseeable future will continue to use the music app, even as Apple phases it out on its own desktop devices, starting with the release of its new Catalina version of macOS.
Researchers at Morphisec discovered the vulnerability and corresponding exploit, which they have attributed to an ongoing malicious campaign that's been targeting U.S. public and private companies with BitPaymer ransomware (aka IEncrypt) since approximately six months ago.
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