{ "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/ubuntu20.04els/vex/2022/cve-2022-3821-els_os-ubuntu20_04els.json" } ], "tracking": { "current_release_date": "2026-05-04T18:20:58Z", "generator": { "date": "2026-05-04T18:20:58Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2022-3821-ELS_OS-UBUNTU20.04ELS", "initial_release_date": "2022-11-08T22:15:00Z", "revision_history": [ { "date": "2022-11-08T22:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-05-04T18:20:58Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security 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"relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "systemd-coredump-0:245.4-4ubuntu3.24+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:systemd-coredump-0:245.4-4ubuntu3.24+tuxcare.els1.amd64" }, "product_reference": "systemd-coredump-0:245.4-4ubuntu3.24+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "systemd-coredump-0:245.4-4ubuntu3.24.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:systemd-coredump-0:245.4-4ubuntu3.24.amd64" }, "product_reference": "systemd-coredump-0:245.4-4ubuntu3.24.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "systemd-coredump-0:245.4-4ubuntu3.24+tuxcare.els2.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:systemd-coredump-0:245.4-4ubuntu3.24+tuxcare.els2.amd64" }, "product_reference": "systemd-coredump-0:245.4-4ubuntu3.24+tuxcare.els2.amd64", "relates_to_product_reference": "Ubuntu-20" } ] }, "vulnerabilities": [ { "cve": "CVE-2022-3821", "cwe": { "id": "CWE-193", "name": "Off-by-one Error" }, "notes": [ { "category": "description", "text": "An off-by-one Error issue was discovered in Systemd in format_timespan() function of time-util.c. An attacker could supply specific values for time and accuracy that leads to buffer overrun in format_timespan(), leading to a Denial of Service.", "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-20:libnss-myhostname-0:245.4-4ubuntu3.24+tuxcare.els1.amd64", "Ubuntu-20:libnss-myhostname-0:245.4-4ubuntu3.24+tuxcare.els2.amd64", "Ubuntu-20:libnss-myhostname-0:245.4-4ubuntu3.24.amd64", "Ubuntu-20:libnss-mymachines-0:245.4-4ubuntu3.24+tuxcare.els1.amd64", "Ubuntu-20:libnss-mymachines-0:245.4-4ubuntu3.24+tuxcare.els2.amd64", "Ubuntu-20:libnss-mymachines-0:245.4-4ubuntu3.24.amd64", "Ubuntu-20:libnss-resolve-0:245.4-4ubuntu3.24+tuxcare.els1.amd64", 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"https://bugzilla.redhat.com/show_bug.cgi?id=2139327" }, { "category": "external", "summary": "https://github.com/systemd/systemd/commit/9102c625a673a3246d7e73d8737f3494446bad4e", "url": "https://github.com/systemd/systemd/commit/9102c625a673a3246d7e73d8737f3494446bad4e" }, { "category": "external", "summary": "https://github.com/systemd/systemd/issues/23928", "url": "https://github.com/systemd/systemd/issues/23928" }, { "category": "external", "summary": "https://github.com/systemd/systemd/pull/23933", "url": "https://github.com/systemd/systemd/pull/23933" }, { "category": "external", "summary": "https://lists.debian.org/debian-lts-announce/2023/06/msg00036.html", "url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00036.html" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RVBQC2VLSDVQAPJTEMTREXDL4HYLXG2P/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RVBQC2VLSDVQAPJTEMTREXDL4HYLXG2P/" }, { "category": "external", "summary": "https://security.gentoo.org/glsa/202305-15", "url": "https://security.gentoo.org/glsa/202305-15" } ], "release_date": "2022-11-08T22:15:00Z", "remediations": [ { "category": "no_fix_planned", "details": "CVE-2022-3821 is a 1‑byte off‑by‑one in systemd’s format_timespan(), a non‑networked helper used to render human‑readable time spans; triggering it requires local execution and the ability to feed crafted time/accuracy values into that specific formatting path, which default system services do not expose to untrusted users. The practical outcome is limited to crashing the calling process (availability only) with no confidentiality, integrity, or privilege‑escalation impact. In centrally managed server/VM environments with minimal interactive local use, opportunities to reach this code path are limited, so this issue can be safely deprioritized.", "product_ids": [ "Ubuntu-20:libnss-myhostname-0:245.4-4ubuntu3.24+tuxcare.els1.amd64", "Ubuntu-20:libnss-myhostname-0:245.4-4ubuntu3.24+tuxcare.els2.amd64", "Ubuntu-20:libnss-myhostname-0:245.4-4ubuntu3.24.amd64", "Ubuntu-20:libnss-mymachines-0:245.4-4ubuntu3.24+tuxcare.els1.amd64", "Ubuntu-20:libnss-mymachines-0:245.4-4ubuntu3.24+tuxcare.els2.amd64", "Ubuntu-20:libnss-mymachines-0:245.4-4ubuntu3.24.amd64", "Ubuntu-20:libnss-resolve-0:245.4-4ubuntu3.24+tuxcare.els1.amd64", "Ubuntu-20:libnss-resolve-0:245.4-4ubuntu3.24+tuxcare.els2.amd64", "Ubuntu-20:libnss-resolve-0:245.4-4ubuntu3.24.amd64", "Ubuntu-20:libnss-systemd-0:245.4-4ubuntu3.24+tuxcare.els1.amd64", "Ubuntu-20:libnss-systemd-0:245.4-4ubuntu3.24+tuxcare.els2.amd64", "Ubuntu-20:libnss-systemd-0:245.4-4ubuntu3.24.amd64", 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