{ "document": { "aggregate_severity": { "text": "High" }, "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/ubuntu18.04els/vex/2023/cve-2023-42465-els_os-ubuntu18_04els.json" } ], "tracking": { "current_release_date": "2026-06-13T08:34:36Z", "generator": { "date": "2026-06-14T03:38:08Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2023-42465-ELS_OS-UBUNTU18.04ELS", "initial_release_date": "2023-12-22T16:15:00Z", "revision_history": [ { "date": "2023-12-22T16:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-11-29T14:40:01Z", "number": "2", "summary": "Official Publication" }, { "date": "2025-12-23T22:15:38Z", "number": "3", "summary": "Update document" }, { "date": "2026-06-13T08:34:36Z", "number": "4", "summary": "Update document" } ], "status": "final", "version": "4" }, "title": "Security update on CVE-2023-42465" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Ubuntu 18.04", "product": { "name": "Ubuntu 18.04", "product_id": "Ubuntu-18", "product_identification_helper": { "cpe": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*" } } } ], "category": "product_family", "name": "Ubuntu" } ], "category": "vendor", "name": "Canonical Ltd." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "product": { "name": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "product_id": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/sudo@1.8.21p2-3ubuntu1.6%2Btuxcare.els2?arch=amd64" } } }, { "category": "product_version", "name": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "product": { "name": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "product_id": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/sudo@1.8.21p2-3ubuntu1.6%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "product": { "name": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "product_id": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/sudo-ldap@1.8.21p2-3ubuntu1.6%2Btuxcare.els2?arch=amd64" } } }, { "category": "product_version", "name": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "product": { "name": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "product_id": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/sudo-ldap@1.8.21p2-3ubuntu1.6%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "product": { "name": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "product_id": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/sudo-ldap@1.8.21p2-3ubuntu1.6%2Btuxcare.els3?arch=amd64" } } }, { "category": "product_version", "name": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "product": { "name": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "product_id": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/sudo@1.8.21p2-3ubuntu1.6%2Btuxcare.els3?arch=amd64" } } } ], "category": "architecture", "name": "amd64" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64" }, "product_reference": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64" }, "product_reference": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64" }, "product_reference": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64" }, "product_reference": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64" }, "product_reference": "sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64" }, "product_reference": "sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "relates_to_product_reference": "Ubuntu-18" } ] }, "vulnerabilities": [ { "cve": "CVE-2023-42465", "notes": [ { "category": "description", "text": "Sudo before 1.9.15 might allow row hammer attacks (for authentication bypass or privilege escalation) because application logic sometimes is based on not equaling an error value (instead of equaling a success value), and because the values do not resist flips of a single bit.", "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" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2023-42465" }, { "category": "external", "summary": "https://arxiv.org/abs/2309.02545", "url": "https://arxiv.org/abs/2309.02545" }, { "category": "external", "summary": "https://github.com/sudo-project/sudo/commit/7873f8334c8d31031f8cfa83bd97ac6029309e4f", "url": "https://github.com/sudo-project/sudo/commit/7873f8334c8d31031f8cfa83bd97ac6029309e4f" }, { "category": "external", "summary": "https://github.com/sudo-project/sudo/releases/tag/SUDO_1_9_15", "url": "https://github.com/sudo-project/sudo/releases/tag/SUDO_1_9_15" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R4Q23NHCKCLFIHSNY6KJ27GM7FSCEVXM/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R4Q23NHCKCLFIHSNY6KJ27GM7FSCEVXM/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6XMRUJCPII4MPWG43HTYR76DGLEYEFZ/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6XMRUJCPII4MPWG43HTYR76DGLEYEFZ/" }, { "category": "external", "summary": "https://security.gentoo.org/glsa/202401-29", "url": "https://security.gentoo.org/glsa/202401-29" }, { "category": "external", "summary": "https://security.netapp.com/advisory/ntap-20240208-0002/", "url": "https://security.netapp.com/advisory/ntap-20240208-0002/" }, { "category": "external", "summary": "https://www.openwall.com/lists/oss-security/2023/12/21/9", "url": "https://www.openwall.com/lists/oss-security/2023/12/21/9" }, { "category": "external", "summary": "https://www.sudo.ws/releases/changelog/", "url": "https://www.sudo.ws/releases/changelog/" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2025/09/23/2", "url": "http://www.openwall.com/lists/oss-security/2025/09/23/2" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2025/09/24/6", "url": "http://www.openwall.com/lists/oss-security/2025/09/24/6" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R4Q23NHCKCLFIHSNY6KJ27GM7FSCEVXM/", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R4Q23NHCKCLFIHSNY6KJ27GM7FSCEVXM/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U6XMRUJCPII4MPWG43HTYR76DGLEYEFZ/", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U6XMRUJCPII4MPWG43HTYR76DGLEYEFZ/" } ], "release_date": "2023-12-22T16:15:00Z", "scores": [ { "cvss_v3": { "attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64" ] } ], "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-06-12T12:58:28.890625Z", "details": "CVE-2023-42465 impacts sudo builds that include specific authentication/policy code paths whose status checks are susceptible to single‑bit flips. In this case, the vendor’s sudo 1.8.21 build is compiled without the affected modules, so the vulnerable logic is not present in the shipped binary. Therefore, there is no reachable vulnerable code path and the CVE does not affect this environment.", "product_ids": [ "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els3.amd64" ] } ] } ] }