Microsoft Won't Say If Its Products Were Exploited By Spyware Zero-Days

Microsoft has released patches to fix zero-day vulnerabilities in two popular open source libraries that affect several Microsoft products, including Skype, Teams and its Edge browser. But Microsoft won't say if those zero-days were exploited to target its products, or if the company knows either way. From a report: The two vulnerabilities -- known as zero-days because developers had no advance notice to fix the bugs -- were discovered last month, and both bugs have been actively exploited to target individuals with spyware, according to researchers at Google and Citizen Lab. The bugs were discovered in two common open source libraries, webp and libvpx, which are widely integrated into browsers, apps and phones to process images and videos. The ubiquity of these libraries coupled with a warning from security researchers that the bugs were abused to plant spyware prompted a rush by tech companies, phone makers and app developers to update the vulnerable libraries in their products. In a brief statement Monday, Microsoft said it had rolled out fixes addressing the two vulnerabilities in the webp and libvpx libraries which it had integrated into its products, and acknowledged that exploits exist for both vulnerabilities. When reached for comment, a Microsoft spokesperson declined to say if its products had been exploited in the wild, or if the company has the ability to know. Security researchers at Citizen Lab said in early September that they had discovered evidence that NSO Group customers, using the company's Pegasus spyware, had exploited a vulnerability found in the software of an up-to-date and fully patched iPhone.

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