The CPUs Affected By Meltdown / Spectre
- AMD CPUs Affected By Spectre
- Apple CPUs Affected By Meltdown / Spectre
- ARM CPUs Affected By Meltdown / Spectre
- Intel Server + Workstation CPUs Affected By Meltdown + Spectre
- Intel Desktop CPUs Affected By Meltdown + Spectre
- Intel Mobile CPUs Affected By Meltdown + Spectre
Are AMD servers vulnerable to Spectre?
The AMD Server CPUs Vulnerable To Spectre Affected Variants : AMD CPUs are affected by both Variants 1 and 2 of the speculative execution CPU bug. Colloquially, many people refer to them as Spectre 1 and Spectre 2. AMD Server CPUs Vulnerable To Spectre
Which CPUs are affected by Meltdown + Spectre?
Intel Desktop CPUs Affected By Meltdown + Spectre 7. Intel Mobile CPUs Affected By Meltdown + Spectre 8. VIA Desktop + Mobile CPUs Vulnerable To Meltdown + Spectre The speculative execution CPU bug that literally kneecapped Intel, also affects many AMD and ARM processors.
What is Spectre and how does it affect your computer?
Spectre can affect processors from AMD, ARM, Intel, and others—any processor that uses branch prediction, in theory, which is basically every modern processor—but the attack must be tailored somewhat specifically to the hardware, making it more difficult to implement. Protecting against Spectre is also more difficult.
Is your smartphone affected by Meltdown/Spectre?
The speculative execution CPU bug that literally kneecapped Intel, also affects many AMD and ARM processors. This means BILLIONS of CPUs around the world, including those powering smartphones, are affected by Meltdown and/or Spectre.
What processors are affected by Spectre and Meltdown?
Pretty much all chips from all major manufacturers created in the last 20 years are affected by Spectre or Meltdown, or both. Although Intel was the first to be identified and the first to acknowledge the problem both in private and in public ARM and AMD CPUs are also affected.
Which CPUs are not affected by Meltdown and Spectre?
AMD processors aren't affected by the Meltdown bug. Chips from Intel, AMD, and ARM are susceptible to Spectre attacks. AMD says its hardware has “near zero” risk to one Spectre variant because of the way its chip architecture is designed, but AMD CPUs can still fall prey to another Spectre flaw.
Are AMD processors affected by Spectre or Meltdown?
Intel CPUs that are vulnerable to MDS are vulnerable to this attack as well, and AMD's Zen, Zen+, Zen 2, and Zen 3 are all affected. But in the more than three years since Spectre and Meltdown were disclosed, only one Spectre exploit is known to exist in the wild, and none targeting Meltdown.
Does Spectre affect AMD?
Spectre is a type of security flaw affecting nearly all modern Intel and AMD processors that can give attackers access to sensitive data while remaining undetected.
Does Intel fix Spectre Meltdown?
The security vulnerability was called Meltdown because "the vulnerability basically melts security boundaries which are normally enforced by the hardware." On 8 October 2018, Intel is reported to have added hardware and firmware mitigations regarding Spectre and Meltdown vulnerabilities to its latest processors.
Is Spectre a hardware vulnerability?
Meltdown and Spectre exploit critical vulnerabilities in modern processors . These hardware vulnerabilities allow programs to steal data which is currently processed on the computer.
What is Spectre CPU?
Spectre is a subset of security vulnerabilities within the class of vulnerabilities known as microarchitectural timing side-channel attacks. These affect modern microprocessors that perform branch prediction and other forms of speculation.
Is AMD safer than Intel?
If combining the two (CPU and GPU vulnerabilities), AMD comes out ahead with 58 total, versus 67 combined for Intel. "Intel security research for 2021 accounts for 50 percent of the issues addressed and an additional 43 percent were reported through Intel's bug bounty program.
What is the difference between Spectre and Meltdown?
In the most basic definition, Spectre is a vulnerability allowing for arbitrary locations in the allocated memory of a program to be read. Meltdown is a vulnerability allowing a process to read all memory in a given system.
What is Spectre V2 vulnerability?
Spectre is a security vulnerability that affects modern microprocessors that perform speculative branch prediction. A side effect of this is the possibility of revealing data to attackers. Though Spectre itself dates back to 2017, similar vulnerabilities have been present for many years.
What is CPU mitigation?
mitigations=off. All CPU side channel mitigations are disabled. This setting gives the highest performance, but least security and should only be used in settings where no untrusted code is used. mitigations=auto. All CPU side channel mitigations are enabled as they are detected based on the CPU type.
What is Retpoline?
Retpoline stands for return and trampoline. • The goal of a retpoline sequence is to control how the CPU performs speculation when executing “jmp” and “call”.
What is the difference between Spectre and meltdown?
In the most basic definition, Spectre is a vulnerability allowing for arbitrary locations in the allocated memory of a program to be read. Meltdown is a vulnerability allowing a process to read all memory in a given system.
Is Spectre fixed?
In March 2018, Intel announced that they had developed hardware fixes for Meltdown and Spectre-V2 only, but not Spectre-V1. The vulnerabilities were mitigated by a new partitioning system that improves process and privilege-level separation.
Does Spectre affect CPU?
AMD: Yes, Spectre does affect our processors. The chipmaker first said there would be "near zero" impact on its chips from one variant of a flaw that makes sensitive information vulnerable. An AMD FX-8320e PC CPU.
Is AMD affected by Spectre?
Yes, chips from Intel and Arm were affected, but what about chips from AMD? AMD on Thursday put out a new statement that left no room for doubt. Each of the two variants of the design flaw called Spectre "is applicable to AMD processors," the company's chief technology officer, Mark Papermaster, said in the statement.
Does Meltdown affect Intel?
The Meltdown flaw only affects chips made by Intel. The confusion is understandable, since AMD's initial statement last week said, in part, that "AMD is not susceptible to all three variants.". In other words, some of AMD's chips are vulnerable to two flaws -- just not all three.
What Is Meltdown And Spectre?
Meltdown and Spectre are two exploits that take advantage of three variants of the speculative execution bug that affects billions of CPUs around the world.
The AMD CPUs Affected By Spectre
Affected Variant : AMD CPUs are only affected by Variant 1 of the speculative execution CPU bug. Colloquially, many people refer to this as Spectre 1.
Are the iPad and Apple TV affected?
Yes and yes. iOS 11.2 mitigates the risk of Meltdown on iPads and tvOS 11.2 does the same for Apple TV. Spectre mitigations are in the works.
Is my iPhone affected by the Spectre CPU flaw?
Short answer, yes. Apple says that all iOS devices are affected by the Spectre bug, but it has yet to push out any OS-level protections against Spectre. They’re on the way, though. On January 8, Apple pushed out updates to iOS 11 and macOS with “security improvements to Safari and WebKit to mitigate the effects of Spectre.”
What is Spectre?
Spectre uses a processor's speculative execution capability and branch prediction, combined with similar approaches to those in Meltdown (eg, cache attacks like Evict+Time), to read secrets from a process's memory. The attack involves training a branch predictor to take one path, and then after many iterations, using a branch mispredict to cause speculative execution of code that shouldn't be run. Up to nearly 200 instructions could be run in some instances. Spectre can affect processors from AMD, ARM, Intel, and others—any processor that uses branch prediction, in theory, which is basically every modern processor—but the attack must be tailored somewhat specifically to the hardware, making it more difficult to implement.
What are Meltdown and Spectre?
Fundamentally, both exploits use somewhat similar core concepts. All modern processors use various features and techniques, including out-of-order execution (OOOE), branch prediction, and speculative execution to improve performance. However, all of these have the potential to execute code that shouldn't be allowed. The hardware guarantees that the final result will be correct, flushing any results from code that shouldn't have run. The problem is that there are side effects of the OOOE and speculative execution, where they can cause changes to the cache state, and then cache attacks can be used to try and pull 'secrets' (data from RAM) out of the cache.
What is a Meltdown exploit?
Meltdown is an exploit that affects Intel CPUs at least since 2011, which leverages elements of out-of-order execution to cause a change in the cache state of a CPU, and then use that to dump contents of memory that should normally be inaccessible.
What does it mean when Intel says "this isn't a bug"?
When Intel says "this isn't a bug" what it really means is "please don't make us recall millions of faulty processors" pic.twitter.com/NPU3WSEjSI January 4, 2018
Does Meltdown make Spectre worse?
If you get a virus on your home PC, it's already compromised, and Meltdown and Spectre don't really make the risk any worse . The main concern revolves around the fix, which is reported to cause a significant slowdown in specific high I/O tasks.
Does OOOE affect Intel?
It may affect many other CPUs as well, basically anything that uses OOOE, which includes all Intel CPUs back to the original Pentium Pro (excluding Itanium and Atom before 2013), and AMD CPUs from a similar time period.
Does Meltdown affect Spectre?
Directly, both Meltdown and Spectre won’t really impact your PC any more than a random virus. There are thousands of viruses circulating at any given time, and if you already practice safe computing, you shouldn't be impacted by anything trying to leverage the Meltdown and Spectre vulnerabilities.
Which processors are affected by Spectre?
Intel, ARM, and Qualcomm are susceptible to all three, while AMD is only affected by Spectre. As we can see, Variant 1 and 3 can be patched in the operating system, while the most nefarious bug, Variant 2, requires both motherboard firmware/microcode and operating system patches.
What are the two vulnerabilities in the Spectre?
Variants 1 and 2 are what we've come to know as Spectre, while Variant 3 is Meltdown. Intel, ARM , and Qualcomm are susceptible to all three, while AMD is only affected by Spectre.
What are the two vulnerabilities in the Land of Patch Confusion?
The Land Of Patch Confusion. There are two general vulnerabilities in play here, and they're broken up into three categories. Variants 1 and 2 are what we've come to know as Spectre, while Variant 3 is Meltdown. Intel, ARM, and Qualcomm are susceptible to all three, while AMD is only affected by Spectre.
Why can't processor vendors push out patches?
Because the patches weren't distributed as drivers, processor vendors couldn't push them out directly. Instead, they filtered out through Microsoft, Linux-based operating systems, OEMs, and motherboard manufacturers. A rapid sequence of patches, re-patches, and un-patches confused enthusiasts in the know.
Is AMD Zen immune to Spectre?
I read originally that AMD Zen architecture had near-immun ity to Spectre variant 2 because a CPU specific code (password if you will) (that changes with each CPU) was required in order to exploit the CPU. Which is why AMD was claiming that Zen was almost immune to Spectre... Read More Reply.
Do older Cpus get performance penalty?
Newer cpus don' t get a performance penalty.. but older ones sure do get a noticeable one..
Do most PC users have older CPUs?
The majority of PC users are going to be on older CPUs than the ones you've tested. These results are only pertinent to the small % of people who have recently bought a CPU / new PC. What about the rest, the majority with older CPUs? That would be a much more useful and interesting analysis for most readers.......
