{ "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", "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-2021-42380-els_os-centos6els.json" } ], "tracking": { "current_release_date": "2026-06-12T15:56:55Z", "generator": { "date": "2026-06-12T15:56:55Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2021-42380-ELS_OS-CENTOS6ELS", "initial_release_date": "2021-11-15T21:15:00Z", "revision_history": [ { "date": "2021-11-15T21:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-10-16T14:34:31Z", "number": "2", "summary": "Official Publication" }, { "date": "2025-11-29T11:36:12Z", "number": "3", "summary": "Update document" }, { "date": "2025-12-23T20:26:03Z", "number": "4", "summary": "Update document" }, { "date": "2026-06-12T15:56:55Z", "number": "5", "summary": "Update document" } ], "status": "final", "version": "5" }, "title": "Security update on CVE-2021-42380" }, "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": "busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "product": { "name": "busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "product_id": "busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/busybox@1.15.1-21.el6_6.tuxcare.els2?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "product": { "name": "busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "product_id": "busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/busybox@1.15.1-21.el6_6.tuxcare.els1?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "product": { "name": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "product_id": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/busybox-petitboot@1.15.1-21.el6_6.tuxcare.els2?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "product": { "name": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "product_id": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/busybox-petitboot@1.15.1-21.el6_6.tuxcare.els3?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "product": { "name": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "product_id": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/busybox-petitboot@1.15.1-21.el6_6.tuxcare.els1?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "product": { "name": "busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "product_id": "busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/busybox@1.15.1-21.el6_6.tuxcare.els3?arch=x86_64&epoch=1" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64" }, "product_reference": "busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64" }, "product_reference": "busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64" }, "product_reference": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64" }, "product_reference": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64" }, "product_reference": "busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64" }, "product_reference": "busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "relates_to_product_reference": "CentOS-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-42380", "cwe": { "id": "CWE-416", "name": "Use After Free" }, "notes": [ { "category": "description", "text": "A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the clrvar function", "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:busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2021-42380" }, { "category": "external", "summary": "https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog", "url": "https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog" }, { "category": "external", "summary": "https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/", "url": "https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/" }, { "category": "external", "summary": "https://security.netapp.com/advisory/ntap-20211223-0002/", "url": "https://security.netapp.com/advisory/ntap-20211223-0002/" }, { "category": "external", "summary": "https://lists.debian.org/debian-lts-announce/2025/01/msg00012.html", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00012.html" } ], "release_date": "2021-11-15T21:15:00Z", "scores": [ { "cvss_v2": { "accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-06-12T12:58:31.820938Z", "details": "Not affected: CVE-2021-42380 targets BusyBox’s awk applet only in versions 1.28.0–1.33.1 (fixed in 1.34.0), while the version under consideration is 1.15.1, which predates the vulnerable code path. In addition, exploitation requires invoking BusyBox’s awk with an attacker-controlled pattern; if the BusyBox awk applet is not present or not used to process untrusted input, the vulnerable path is not reachable in typical server/VM deployments.", "product_ids": [ "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "CentOS-6:busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "CentOS-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64" ] } ] } ] }