{ "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/centos6els/vex/2021/cve-2021-45444-els_os-centos6els.json" } ], "tracking": { "current_release_date": "2026-06-12T15:25:28Z", "generator": { "date": "2026-06-12T15:25:28Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2021-45444-ELS_OS-CENTOS6ELS", "initial_release_date": "2021-01-01T00:00:00Z", "revision_history": [ { "date": "2021-01-01T00:00:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-06-12T15:25:28Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2021-45444" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 6", "product": { "name": "Community Enterprise Operating System 6", "product_id": "CentOS-6", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" } ], "category": "vendor", "name": "Red Hat, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "zsh-html-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "product": { "name": "zsh-html-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "product_id": "zsh-html-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/zsh-html@4.3.11-11.el6_10.tuxcare.els1?arch=x86_64" } } }, { "category": "product_version", "name": "zsh-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "product": { "name": "zsh-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "product_id": "zsh-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/zsh@4.3.11-11.el6_10.tuxcare.els1?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "zsh-html-0:4.3.11-11.el6_10.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:zsh-html-0:4.3.11-11.el6_10.tuxcare.els1.x86_64" }, "product_reference": "zsh-html-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "zsh-0:4.3.11-11.el6_10.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:zsh-0:4.3.11-11.el6_10.tuxcare.els1.x86_64" }, "product_reference": "zsh-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-45444", "notes": [ { "category": "description", "text": "In zsh before 5.8.1, an attacker can achieve code execution if they control a command output inside the prompt, as demonstrated by a %F argument. This occurs because of recursive PROMPT_SUBST expansion.", "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": [ "CentOS-6:zsh-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "CentOS-6:zsh-html-0:4.3.11-11.el6_10.tuxcare.els1.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2021-45444" }, { "category": "external", "summary": "http://seclists.org/fulldisclosure/2022/May/33", "url": "http://seclists.org/fulldisclosure/2022/May/33" }, { "category": "external", "summary": "http://seclists.org/fulldisclosure/2022/May/35", "url": "http://seclists.org/fulldisclosure/2022/May/35" }, { "category": "external", "summary": "http://seclists.org/fulldisclosure/2022/May/38", "url": "http://seclists.org/fulldisclosure/2022/May/38" }, { "category": "external", "summary": "https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html", "url": "https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2P3LPMGENEHKDWFO4MWMZSZL6G7Y4CV7/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2P3LPMGENEHKDWFO4MWMZSZL6G7Y4CV7/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BWF3EXNBX5SVFDBL4ZFOD4GJBWFUKWN4/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BWF3EXNBX5SVFDBL4ZFOD4GJBWFUKWN4/" }, { "category": "external", "summary": "https://support.apple.com/kb/HT213255", "url": "https://support.apple.com/kb/HT213255" }, { "category": "external", "summary": "https://support.apple.com/kb/HT213256", "url": "https://support.apple.com/kb/HT213256" }, { "category": "external", "summary": "https://support.apple.com/kb/HT213257", "url": "https://support.apple.com/kb/HT213257" }, { "category": "external", "summary": "https://vuln.ryotak.me/advisories/63", "url": "https://vuln.ryotak.me/advisories/63" }, { "category": "external", "summary": "https://www.debian.org/security/2022/dsa-5078", "url": "https://www.debian.org/security/2022/dsa-5078" }, { "category": "external", "summary": "https://zsh.sourceforge.io/releases.html", "url": "https://zsh.sourceforge.io/releases.html" } ], "release_date": "2022-02-14T12:15:00Z", "scores": [ { "cvss_v2": { "accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "CentOS-6:zsh-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "CentOS-6:zsh-html-0:4.3.11-11.el6_10.tuxcare.els1.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-06-12T13:00:53.130785Z", "details": "Not affected: This CVE requires the upstream zsh code path that performs recursive PROMPT_SUBST evaluation of prompt-escape arguments (e.g., %F) present in versions before 5.8.1. Red Hat has reviewed its zsh package and marked it not vulnerable because the affected source code is not included in their build. Consequently, the recursive prompt-substitution path is absent and code execution via controlled prompt output is not reachable in this environment.", "product_ids": [ "CentOS-6:zsh-0:4.3.11-11.el6_10.tuxcare.els1.x86_64", "CentOS-6:zsh-html-0:4.3.11-11.el6_10.tuxcare.els1.x86_64" ] } ] } ] }