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Malicious microcode vulnerability discovered, fixes rolling out for Epycs at least Googlers have not only figured out how to break AMD's security – allowing them to load unofficial microcode into its processors to modify the silicon's behavior as they wish – but also demonstrated this by producing a microcode patch that makes the chips always output 4 when asked for a random number.…

Answers on a postcard to what 'Microcode Signature Verification Vulnerability' might mean AMD has confirmed at least some of its microprocessors suffer a microcode-related security vulnerability, the existence of which accidentally emerged this month after a fix for the flaw appeared in a beta BIOS update from PC maker Asus.…

The Register 2 years, 11 months ago

AMD Zenbleed chip bug leaks secrets fast and easy

Zen 2 flaw more simple than Spectre, exploit code already out there – get patching when you can AMD has started issuing some patches for its processors affected by a serious silicon-level bug dubbed Zenbleed that can be exploited by rogue users and malware to steal passwords, cryptographic keys, and other secrets from software running on a vulnerable system.…

And Adobe, SAP, Intel, AMD, Cisco, Google join in Patch Tuesday Microsoft has addressed 71 security flaws, including three critical remote code execution vulnerabilities, in its monthly Patch Tuesday update. The IT giant is confident none of the bugs have been actively exploited. …