Amd threadripper12/3/2023 ![]() While the exploit runs, it shows off the sensitive data being processed by the box, which can appear in fragments or in whole depending on the code running at the time. It should also work in virtualized guests that run on the bare metal. Proof-of-concept exploit code, produced by Ormandy, is available here, and we've confirmed it works on a Zen 2 Epyc server system when running on bare metal. It's understood a malicious webpage, running some carefully crafted JavaScript, could quietly exploit Zenbleed on a personal computer to snoop on this information. Malware already running on a system, or a rogue logged-in user, can exploit Zenbleed without any special privileges and inspect data as it is being processed by applications and the operating system, which can include sensitive secrets, such as passwords. Exploiting Zenbleed involves abusing speculative execution, though unlike the related Spectre family of design flaws, the bug is pretty easy to exploit. That's practical enough for someone on a shared server, such as a cloud-hosted box, to spy on other tenants. Zenbleed affects Ryzen and Epyc Zen 2 chips, and can be abused to swipe information at a rate of at least 30Kb per core per second. Like AMD, Intel should reveal more about its plans at Computex, which takes place in Taipei from May 30 to June 1.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. However, Kaby Lake-X is rumoured to use the new X299 chipset, which would be a dramatic change in tack for Intel. Kaby Lake-X would be similar to the Devil's Canyon chips Intel produced for its Haswell architecture, which were a refined version of existing chips. Intriguingly, the rumours also point to Intel launching Kaby Lake-X processors with just four cores and eight threads in the Core i7-7740K and four-cores and no hyper-threading in the Core i7-7640K. The follow-up to Broadwell-E, Skyake-E, is rumoured to sport an all-new Core i9 moniker alongside a new X299 chipset, with the top-end Core i9-7920X part featuring 12 cores and 24 threads. The launch of Threadripper follows weeks of rumours surrounding Intel's upcoming Skylake-E processors. That's a potential maximum of 4TB of memory, which will come in handy for places like VFX render farms where a single frame of a film can consume gigabytes of memory. ![]() The physically massive Epyc chip sports 32 cores and 64 threads, 128 PCIe 3.0 lanes, and eight memory channels per socket for a total of 16 DDR4 channels and 32 DIMMs in a two-socket server. Meanwhile, Ryzen Pro desktop and mobile chips, which offer "enterprise-class support and top-to-bottom manageability," will launch in H2 2017 and H1 2018 respectively. AMD claims a "50 percent increase in CPU performance and over 40 percent better graphics performance, at half the power of its previous generation." Once again AMD is saving further details for Computex, but it noted that Ryzen APUs will appear in ultra-portables and premium 2-in-1s in the second half of 2017. In addition to Threadripper, AMD also teased Ryzen APUs that pair four cores and eight threads with a Vega-based GPU. ![]() That's likely to take the form of quad-channel RAM and more PCIe lanes, similar to Intel's X99 platform, but AMD is saving further details for its press conference at Computex at the end of May. With one of the gnarliest CPU codenames we've ever seen, the Threadripper multicore monsters will go head to head with Intel's Broadwell-E and upcoming Skylake-E High-End Desktop (HEDT) CPUs alongside a new motherboard platform that promises expanded memory support and I/O bandwidth. 16-core, 32-thread versions of AMD Ryzen CPUs codenamed Threadripper will launch this summer, the company revealed at its Financial Analyst Day yesterday.
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