Protect your Intel CPU from plunder volt attacks your overclock can ruin, maybe

Protect your Intel CPU from plunder volt attacks your overclock, maybe

can ruin A new attack on the Intel CPUs, called plunder volts, can be an unforeseen consequence. The slowdown in the fixes, it seems to lock the CPU voltage to default settings that may prevent that user undervolting or overclocking them.

On Wednesday, but Intel representatives said that it is unlikely that the SGX to use and overclock overlap, which means that the risk to consumers is rather limited.

According to the researchers, the attack, the fables of the paper in question, all mobile-and desktop-Intel-Core-processor is since the sixth-generation “Skylake” forward, support for Intel Software Guard Extensions (SGX) is vulnerable to the software that injected the error into the processor package of very short, a reduction of the processor voltage. The injection of these errors can reproduce to errors in otherwise safe code, or cryptographic keys that of what the researchers call negligible computational efforts.

The researchers said they believe that the attacks can be mounted by a remote attacker, and not only with local access.

As most researchers do, the team of researchers at the University of Birmingham, the University of Graz, and imec-DistriNet—reported susceptibility to Intel, said in a recommendation, and also, that it had released firmware updates for the motherboard manufacturer. A related blog post from Intel said that the company was aware of any problems in the wilderness. 

the Majority of users are not affected by plunder volt itself, because it requires first of all an attack against the system. If SGX has not been activated, or if the CPU voltage to the default values, even the system is not vulnerable to this attack method, an Intel spokeswoman added, in a follow-up E-Mail in response to a PCWorld issue.

published for The attenuation of Intel, however, seems lock to prevent your PC voltage settings, you of your setting. “Intel has to develop with the system provider, the blog is a microcode update that mitigates the Problem of supply voltage to the default settings”, a relative of Intel-the post, says. 

[ read More: The best CPUs for games ]

“A BIOS to disable the update, to enable the voltage to default settings, which reduces this vulnerability without the need for the user and everything is usually added by the system manufacturer,” Intel spokeswoman, via E-Mail. “We recommend that you check with the manufacturer of your system, in order to better understand voltage settings.”

The medicine worse than the disease. It sounds like the plunder volt climate protection could effectively remove option to “undervolt” a laptop, a technique used by some of the enthusiasts in order to extend the battery life and the longevity of laptops. Through the use of Intel eXtreme Tuning Utility, undervol TERS at the bottom, select the operating voltage of your PC by tiny increments, until a voltage to find the level that your PC can run under load. By shaving off a few hundredths or thousandths of a volt, the battery life can be extended proportionally. A PC CPU voltage can also be adjusted via overclocking on desktop PCs, where the focus is primarily on the CPU clock-speed, rather than the core voltage itself.

In either case, some questions remain open, including the boards and laptops apply to the climate protection, and whether the users have the option to install. It is also not clear whether the minimum is of Intel to send to the manufacturer of the motherboard will be disabled, in fact, always a more CPU voltage changes via software, or whether this ability is permanent. 

According the plunder volt researchers, “if you don’t use SGX, you need to do something,” she wrote.  “If you do, use SGX: Intel released a microcode update that—along with a BIOS update allows you to disable the undervolting interface.”

Does your motherboard support SGX? It is not likely that most of the newer boards do, although it is not clear whether the feature has been enabled by default. Here is a list of the SGX’s boards and platforms, compiled over at GitHub. MSI’s customer support Website claims that the company supports the function, also. As we learn new information, we will update this post.

Update 12/11: According to updated figures from Intel, the Intel “working with system manufacturers to provide a balance between performance and security for platforms with support for overclocking of processors,” said a representative of Intel, in an E-Mail. On processors such as Intel’s K-series chips—the preference can be set so that voltages are changed.

“We expect that limited amount of overlap between use cases in which Intel SGX, and overclocking are the two relevant,” the representative added, but probably means that there is little chance that the average PC-user will be affected. In the case that the mild is  applied, but Intel’s XTU tuning utility not allow voltage changes from the default.

story updated at 3:47PM PT on Dec. 11 with additional comment from Intel.

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Released on Thu, 11 Dec 2019 23:48:00 +0000

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