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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2004 USN-4385-1: Intel Microcode vulnerabilities 10 June 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Intel Microcode Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Access Privileged Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-0549 CVE-2020-0548 CVE-2020-0543 Reference: ESB-2020.1994 ESB-2020.0892 Original Bulletin: https://usn.ubuntu.com/4385-1/ - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4385-1: Intel Microcode vulnerabilities 9 June 2020 intel-microcode vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 20.04 LTS o Ubuntu 19.10 o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS o Ubuntu 14.04 ESM Summary Several security issues were fixed in Intel Microcode. Software Description o 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 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . After a standard system update you need to reboot your computer to make all the necessary changes. References o CVE-2020-0543 o CVE-2020-0548 o CVE-2020-0549 o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SRBDS - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXuBKVuNLKJtyKPYoAQhqpw/9E7B13Ft1Q1LCollLa550a9BshYM7jDTZ BXRQ1/X7kGDA0p7AoFaTnc8oQROQr/T9jcBI+/UkpIWoEr/Or/peB9NZiW0CmKdV f6QSVVcEqJmKt7TJN5+CqLlPDIAIOo5rNaooOY+ffzLCR9tBv9qvbEu8wMfHdCad dsB6Lk7OkkBpXDh2k2eLV5yOMXgK590IbGGeJNMaO9pz/p0++9G2REFHQlLAraUh qFhVuWI1+Sk4/luJqmra69extGCQBK6f7xaBYuuyXPPpiDLVdiirpvuaQ9VEZxzZ zUHCoCbjzwDWz6Mye2+JIF3FCspxqsamM14HYlFpZjn6Za/vXiPUXOBWg4JZq1sh UyHV07IOkeHxaCP4GuBPHohrdOlpVX0QZbj8pqKNA362tPcoLfZ5+5dREOgmnYHT +YEoPiMgNDAPp5lqhfz2IcXUhJBWDAsQq1gOQaUrqjEldyxraVMoehE1/LpC1NlQ TRK3mISqMzstfkBX4vasUXIgdDG86mhx07PXEZofDI/Bh0lBVFcVsIK4j86xJsWR gV14yIFsPlvcBp417DeWYJeiIt5px6E5KBnt87nFX66IRmTPZ9KcqBfj5CgV6EHt ox+SjsF3MOE2nYEdiTd6npbjMM4RSM7d4Wx/mKCA/hfSiRDwjqzEisrkVHlU7LT4 l9C29iQvONA= =rItV -----END PGP SIGNATURE-----