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Manufacturers usually provide updates over unauthenticated HTTP and FTP connections, leaving users vulnerable to man-in-the-middle attacks.

Unfortunately, only a small percentage of manufacturers cryptographically sign their BIOS updates, and few motherboards can verify signatures.

Back in 1999, the infamous Chernobyl virus, or CIH virus, decimated at least 700,000 systems worldwide.

The Chernobyl malware was designed to overwrite the hard drive and erase the flash BIOS for motherboards that use the Pentium 430TX chipset.

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Second, the emergence of Trusted Platform Module (TPM) standards and similar initiatives means that some new equipment supports hardware-based BIOS integrity How is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors.To create this article, 11 people, some anonymous, worked to edit and improve it over time. It is a set of electronic instructions stored on a chip inside your desktop or laptop.However, Chernobyl's effect on BIOSes was limited, since it could only affect a specific chipset, and the payload was unsophisticated.Nowadays, modern BIOS attacks have the potential to be extremely stealthy and portable.

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