{ "document": { "aggregate_severity": { "text": "Medium" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/ubuntu16.04els/vex/2020/cve-2020-0543-els_os-ubuntu16_04els.json" } ], "tracking": { "current_release_date": "2026-08-02T11:53:22Z", "generator": { "date": "2026-08-02T11:53:22Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2020-0543-ELS_OS-UBUNTU16.04ELS", "initial_release_date": "2020-06-15T14:15:00Z", "revision_history": [ { "date": "2020-06-15T14:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-04-14T08:52:11Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-04-20T14:17:09Z", "number": "3", "summary": "Update document" }, { "date": "2026-06-13T04:33:30Z", "number": "4", "summary": "Update document" }, { "date": "2026-08-02T11:53:22Z", "number": "5", "summary": "Update document" } ], "status": "final", "version": "5" }, "title": "Security update on CVE-2020-0543" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version", "name": "linux-firmware-0:1.157.23-.all", "product": { "name": "linux-firmware-0:1.157.23-.all", "product_id": "linux-firmware-0:1.157.23-.all", "product_identification_helper": { "purl": "pkg:deb/ubuntu/linux-firmware@1.157.23-?arch=all" } } } ], "category": "architecture", "name": "all" }, { "branches": [ { "category": "product_name", "name": "Ubuntu 16.04", "product": { "name": "Ubuntu 16.04", "product_id": "Ubuntu-16", "product_identification_helper": { "cpe": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*" } } } ], "category": "product_family", "name": "Ubuntu" } ], "category": "vendor", "name": "Canonical Ltd." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "linux-firmware-0:1.157.23+tuxcare.els2.all", "product": { "name": "linux-firmware-0:1.157.23+tuxcare.els2.all", "product_id": "linux-firmware-0:1.157.23+tuxcare.els2.all", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-firmware@1.157.23%2Btuxcare.els2?arch=all" } } }, { "category": "product_version", "name": "linux-firmware-0:1.157.23+tuxcare.els1.all", "product": { "name": "linux-firmware-0:1.157.23+tuxcare.els1.all", "product_id": "linux-firmware-0:1.157.23+tuxcare.els1.all", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-firmware@1.157.23%2Btuxcare.els1?arch=all" } } } ], "category": "architecture", "name": "all" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "linux-firmware-0:1.157.23+tuxcare.els2.all as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els2.all" }, "product_reference": "linux-firmware-0:1.157.23+tuxcare.els2.all", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-firmware-0:1.157.23+tuxcare.els1.all as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els1.all" }, "product_reference": "linux-firmware-0:1.157.23+tuxcare.els1.all", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-firmware-0:1.157.23-.all as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-firmware-0:1.157.23-.all" }, "product_reference": "linux-firmware-0:1.157.23-.all", "relates_to_product_reference": "Ubuntu-16" } ] }, "vulnerabilities": [ { "cve": "CVE-2020-0543", "cwe": { "id": "CWE-459", "name": "Incomplete Cleanup" }, "notes": [ { "category": "description", "text": "Incomplete cleanup from specific special register read operations in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "known_affected": [ "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els1.all", "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els2.all", "Ubuntu-16:linux-firmware-0:1.157.23-.all" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2020-0543" }, { "category": "external", "summary": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00025.html", "url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00025.html" }, { "category": "external", "summary": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.html", "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.html" }, { "category": "external", "summary": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.html", "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.html" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2020/07/14/5", "url": "http://www.openwall.com/lists/oss-security/2020/07/14/5" }, { "category": "external", "summary": "https://cert-portal.siemens.com/productcert/pdf/ssa-534763.pdf", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-534763.pdf" }, { "category": "external", "summary": "https://kc.mcafee.com/corporate/index?page=content&id=SB10318", "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10318" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DT2VKDMQ3I37NBNJ256A2EXR7OJHXXKZ/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DT2VKDMQ3I37NBNJ256A2EXR7OJHXXKZ/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GRFC7UAPKAFFH5WX3AMDUBVHLKYQA2NZ/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GRFC7UAPKAFFH5WX3AMDUBVHLKYQA2NZ/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NQZMOSHLTBBIECENNXA6M7DN5FEED4KI/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NQZMOSHLTBBIECENNXA6M7DN5FEED4KI/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5OUM24ZC43G4IDT3JUCIHJTSDXJSK6Y/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5OUM24ZC43G4IDT3JUCIHJTSDXJSK6Y/" }, { "category": "external", "summary": "https://usn.ubuntu.com/4385-1/", "url": "https://usn.ubuntu.com/4385-1/" }, { "category": "external", "summary": "https://usn.ubuntu.com/4387-1/", "url": "https://usn.ubuntu.com/4387-1/" }, { "category": "external", "summary": "https://usn.ubuntu.com/4388-1/", "url": "https://usn.ubuntu.com/4388-1/" }, { "category": "external", "summary": "https://usn.ubuntu.com/4389-1/", "url": "https://usn.ubuntu.com/4389-1/" }, { "category": "external", "summary": "https://usn.ubuntu.com/4390-1/", "url": "https://usn.ubuntu.com/4390-1/" }, { "category": "external", "summary": "https://usn.ubuntu.com/4391-1/", "url": "https://usn.ubuntu.com/4391-1/" }, { "category": "external", "summary": "https://usn.ubuntu.com/4392-1/", "url": "https://usn.ubuntu.com/4392-1/" }, { "category": "external", "summary": "https://usn.ubuntu.com/4393-1/", "url": "https://usn.ubuntu.com/4393-1/" }, { "category": "external", "summary": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00320.html", "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00320.html" } ], "release_date": "2020-06-15T14:15:00Z", "remediations": [ { "category": "no_fix_planned", "date": "2026-06-12T13:08:13.354512Z", "details": "CVE-2020-0543 (SRBDS/CrossTalk) is a local side-channel that only exposes results of specific special‑register reads (RDRAND, RDSEED, and SGX EGETKEY), requiring an attacker to already run code on the same host and to coincide with a victim executing those instructions. It does not enable arbitrary memory disclosure or affect integrity/availability, and the SGX‑related aspect is irrelevant when SGX is disabled. Intel microcode updates released in 2020 harden these instructions by clearing shared buffers, further limiting practical exploitability, so this can be safely deprioritized in centrally managed server/VM environments.", "product_ids": [ "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els1.all", "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els2.all", "Ubuntu-16:linux-firmware-0:1.157.23-.all" ] } ], "scores": [ { "cvss_v2": { "accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.1, "baseSeverity": "LOW", "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1" }, "products": [ "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els1.all", "Ubuntu-16:linux-firmware-0:1.157.23+tuxcare.els2.all", "Ubuntu-16:linux-firmware-0:1.157.23-.all" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ] } ] }