Questions tagged [meltdown]

A side-channel vulnerability affecting Intel x86 and few ARM-based microprocessors allowing user processes to read memory belonging to the kernel. Affects various OSes like Linux, OS X, and Windows. Published in January 2018.

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How to select a CPU to buy for the best security?

Various versions of Spectre, Meltdown, Foreshadow and ZombieLoad make it quite the jungle trip to navigate which CPUs are affected, how to mitigate them. Right now, my problem is that I need a new ...
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Mitigation of Spectre and Meltdown affecting host OS from guest OS (Virtualbox)

I don't know all the details of Spectre and Meltdown, but the way I understand it is that they allow reading from memory, not writing to it. Also, I read that at least Spectre can get out of the ...
reed's user avatar
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Prefetch Side-Channel Attacks:Bypassing SMAP and Kernel ASLR

I'm trying to understand and perform the Prefetch Side-Channel Attacks:Bypassing SMAP and Kernel ASLR. The author have released the proof-of-concept code. I'm trying to run the attack on my Intel ...
parisa's user avatar
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How would one compare Cache Allocating Technology against MIT's Dynamically Allocated Way Guard for prevention of the Spectre side-channel Attack?

Upon research, I'm finding it difficult to identify a way to compare each solution. Is it correct in saying both solutions are software based? Therefore, could I compare overall PC perfomance with ...
Chris's user avatar
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Software mitigation for variant 3a (rogue system register read) and variant 4 (speculative store bypass)

AFAIK, all mitigable meltdown / spectre variants have software mitigation except for variant 3a and 4. Why is this the case? For variant 4, a straightforward software mitigation is to place lfence ...
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Nessus ADV180002: Microsoft SQL Server January 2018 Security Update (Meltdown) (Spectre)

I have a MS Server 2012 r2 running ArcServe 17.5, which uses MSSQL Server Express 2014. When Nessus runs a scan of this system, I am getting the plugin 105613 - ADV180002: Microsoft SQL Server January ...
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Secure code makes exploitation easier with CPU vulnerabilities?

I researched CPU vulnerabilities in the past, such as Specter and Meltdown. I read that one of those attacks is made easier if the code is a certain way. I cannot remember if it was related to being ...
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Meltdown checker says AWS and Rackspace is vulnerable - Why?

Today I was curious how my vmware environment stacked up against Spectre and Meltdown. So I ran spectre-meltdown-checker. It came back clean with 7 of 8 variants OK (the failed one is apparently ...
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