A new Spectre attack can be launched over the network, unlike all other Spectre variants that require some form of local code execution on the target system. Intel paid out a $100,000 bug bounty to a team of researchers for finding and reporting new processor vulnerabilities that were also related to Spectre variant 1. Intel said it has updated its white paper titled “Analyzing potential bounds check bypass vulnerabilities” to include information related the NetSpectre attack. The attack could allow attackers to read arbitrary memory from the systems available on the network containing the required Spectre gadgets.
Source: https://thehackernews.com/2018/07/netspectre-remote-spectre-attack.html