News Posts matching "RIDL"

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Intel Tried to Bribe Dutch University to Suppress Knowledge of MDS Vulnerability

Cybersecurity researchers at the Vrije Universiteit Amsterdam, also known as VU Amsterdam, allege that Intel tried to bribe them to suppress knowledge of the latest processor security vulnerability RIDL (rogue in-flight data load), which the company made public on May 14. Dutch publication Nieuwe Rotterdamsche Courant reports that Intel offered to pay the researchers a USD $40,000 "reward" to allegedly get them to downplay the severity of the vulnerability, and backed their offer with an additional $80,000. The team politely refused both offers.

Intel's security vulnerability bounty program is shrouded in CYA agreements designed to minimize Intel's losses from the discovery of a new vulnerability. Under its terms, once a discoverer accepts the bounty reward, they enter into a NDA (non-disclosure agreement) with Intel, to not disclose their findings or communicate in the regard with any other person or entity than with certain authorized people at Intel. With public knowledge withheld, Intel can work on mitigation and patches against the vulnerability. Intel argues that information of vulnerabilities becoming public before it's had a chance to address them would give the bad guys time to design and spread malware that exploits the vulnerability. This is an argument the people at VU weren't willing to buy, and thus Intel is forced to disclose RIDL even as microcode updates, software updates, and patched hardware are only beginning to come out.

Update: (17/05): An Intel spokesperson commented on this story.

AMD Confirms its Processors are Unaffected by RIDL and Fallout Vulnerabilities

AMD in a statement confirmed that its processors are unaffected by the RIDL (Rogue In-Flight Data Load) and Fallout vulnerabilities. The company however worded its statement in CYA language, just to be safe. "...we believe our products are not susceptible to 'Fallout' or 'RIDL' because of the hardware protection checks in our architecture. We have not been able to demonstrate these exploits on AMD products and are unaware of others having done so," reads the AMD statement put out late Tuesday (14th May).

AMD came to these conclusions on the basis of its own testing and discussions with the researchers who discovered RIDL. It's important to note here, that the "Fallout" vulnerability AMD is referring to in this statement is the one which is part of four MDS vulnerabilities Intel disclosed yesterday, and not the identically named "Fallout" vulnerability discovered by CTS Labs in 2018, allegedly affecting secure memory management of AMD "Zen" processors.

Yet Another Speculative Malfunction: Intel Reveals New Side-Channel Attack, Advises Disabling Hyper-Threading Below 8th, 9th Gen CPUs

Ouch doesn't even begin to describe how much that headline hurt. As far as speculative execution goes, it's been well covered by now, but here's a refresher. Speculative execution essentially means that your CPU tries to think ahead of time on what data may or may not be needed, and processes it before it knows it's needed. The objective is to take advantage of concurrency in the CPU design, keeping processing units that would otherwise be left idle to process and deliver results on the off-chance that they are indeed required by the system: and when they are called for, the CPU saves time by not having to process them on the fly and already having them available.

The flaws have been announced by Intel in coordination with Austrian university TU Graz, Vrije Universiteit Amsterdam, the University of Michigan, the University of Adelaide, KU Leuven in Belgium, Worcester Polytechnic Institute, Saarland University in Germany and security firms Cyberus, BitDefender, Qihoo360 and Oracle. While some of the parties involved have named the four identified flaws with names such as "ZombieLoad", "Fallout", and RIDL, or "Rogue In-Flight Data Load", Intel is using the PEGI-13 "Microarchitectural Data Sampling (MDS)" name.
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