Home Resources Blog New Spectre Attack Enables Secrets to be Leaker Over a Network

New Spectre Attack Enables Secrets to be Leaker Over a Network

Admin Globaldots
27.07.2018
image 1 Min read

When the Spectre and Meltdown attacks were disclosed earlier this year, the initial exploits required an attacker to be able to run code of their choosing on a victim system. This made browsers vulnerable, as suitably crafted JavaScript could be used to perform Spectre attacks. Cloud hosts were susceptible, too. But outside these situations, the impact seemed relatively limited.

That impact is now a little larger. Researchers from Graz University of Technology, including one of the original Meltdown discoverers, Daniel Gruss, have described NetSpectre: a fully remote attack based on Spectre. With NetSpectre, an attacker can remotely read the memory of a victim system without running any code on that system.

All the variants of the Spectre attacks follow a common set of principles. Each processor has an architectural behavior (the documented behavior that describes how the instructions work and that programmers depend on to write their programs) and a microarchitectural behavior (the way an actual implementation of the architecture behaves). These can diverge in subtle ways.

NetSpectre builds on these principles; it just has to work a lot harder to exploit them. With a malicious JavaScript, for example, exploitation is fairly straightforward. The JavaScript developer has relatively fine control over the instructions the processor executes and can both perform speculative execution and measure differences in cache performance quite easily.

Image Source

Read more: Ars Technica

Learn More

You’ll Need Zero Trust, But You Won’t Get It with a VPN
SD-WAN and SASE
Eyal Webber Zvik, Cato Networks 12.01.23

Properly implemented, a zero trust architecture provides much more granular and effective security than legacy security models. However, this is only true if a zero trust initiative is supported with the right tools. Legacy solutions, such as virtual private networks (VPNs), lack the capabilities necessary to implement a zero trust security strategy. Zero Trust Security is […]

Read more
4 Ways Where Remote Access VPNs Fall Short
SD-WAN and SASE
Eyal Webber Zvik, Cato Networks 09.01.23

The Global Content Delivery Network (CDN) market is expected to grow by $42.4 billion between now and 2032.

Read more
slider item
Content Delivery Network (CDN)
Francesco Altomare, Southern Europe Regional Manager @ GlobalDots 04.01.23

A Content Delivery Network (CDN) is a globally distributed network of web servers or Points of Presence (PoP) whose purpose is to provide faster content delivery. The content is replicated and stored throughout the CDN so the user can access the data that is stored at a location that is geographically closest to the user. […]

Read more
Unlock Your Cloud Potential
Schedule a call with our experts. Discover new technology and get recommendations to improve your performance.
Book a Demo