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Intel updates three vulnerabilities: CVE-2018-3615, CVE-2018-3620, CVE-2018-3646
The first vulnerability, CVE-2018-3615, affects Intel SGX technology and is referred to by the researchers who discovered it as foreshadow. This vulnerability is not known to affect any Cisco devices as the Cisco devices do not utilize Intel SGX technology.

The second vulnerability, CVE-2018-3620, and the third vulnerability, CVE-2018-3646, are referred to as L1 Terminal Fault attacks by Intel. These two vulnerabilities affect multi-core processors that leverage Intel Hyper-Threading technology supporting Operating System, System Management Mode, and Virtualized workloads. Like the previously disclosed Spectre vulnerabilities, all three new vulnerabilities leverage cache-timing attacks to infer any disclosed data.

To exploit any of these vulnerabilities, an attacker must be able to run crafted or script code on an affected device. Although the underlying CPU and operating system combination in a product or service may be affected by these vulnerabilities, the majority of Cisco products are closed systems that do not allow customers to run custom code and are, therefore, not vulnerable. There is no vector from which to exploit them. Cisco products are considered potentially vulnerable only if they allow customers to execute custom code side-by-side with Cisco code on the same microprocessor.