========================================================================= Ubuntu Security Notice USN-4385-1 June 09, 2020 intel-microcode vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 19.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 ESM Summary: Several security issues were fixed in Intel Microcode. Software Description: - intel-microcode: Processor microcode for Intel CPUs Details: It was discovered that memory contents previously stored in microarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY read operations on Intel client and Xeon E3 processors may be briefly exposed to processes on the same or different processor cores. A local attacker could use this to expose sensitive information. (CVE-2020-0543) It was discovered that on some Intel processors, partial data values previously read from a vector register on a physical core may be propagated into unused portions of the store buffer. A local attacker could possible use this to expose sensitive information. (CVE-2020-0548) It was discovered that on some Intel processors, data from the most recently evicted modified L1 data cache (L1D) line may be propagated into an unused (invalid) L1D fill buffer. A local attacker could possibly use this to expose sensitive information. (CVE-2020-0549) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: intel-microcode 3.20200609.0ubuntu0.20.04.0 Ubuntu 19.10: intel-microcode 3.20200609.0ubuntu0.19.10.0 Ubuntu 18.04 LTS: intel-microcode 3.20200609.0ubuntu0.18.04.0 Ubuntu 16.04 LTS: intel-microcode 3.20200609.0ubuntu0.16.04.0 Ubuntu 14.04 ESM: intel-microcode 3.20200609.0ubuntu0.14.04.0 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://usn.ubuntu.com/4385-1 CVE-2020-0543, CVE-2020-0548, CVE-2020-0549, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SRBDS Package Information: https://launchpad.net/ubuntu/+source/intel-microcode/3.20200609.0ubuntu0.20.04.0 https://launchpad.net/ubuntu/+source/intel-microcode/3.20200609.0ubuntu0.19.10.0 https://launchpad.net/ubuntu/+source/intel-microcode/3.20200609.0ubuntu0.18.04.0 https://launchpad.net/ubuntu/+source/intel-microcode/3.20200609.0ubuntu0.16.04.0