{ "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/oraclelinux6els/vex/2021/cve-2021-28831-els_os-oraclelinux6els.json" } ], "tracking": { "current_release_date": "2026-06-13T01:17:11Z", "generator": { "date": "2026-06-13T01:17:11Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2021-28831-ELS_OS-ORACLELINUX6ELS", "initial_release_date": "2021-03-19T05:15:00Z", "revision_history": [ { "date": "2021-03-19T05:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-11-29T11:17:54Z", "number": "2", "summary": "Official Publication" }, { "date": "2025-12-23T22:15:38Z", "number": "3", "summary": "Update document" }, { "date": "2026-06-13T01:17:11Z", "number": "4", "summary": "Update document" } ], "status": "final", "version": "4" }, "title": "Security update on CVE-2021-28831" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Oracle Linux 6", "product": { "name": "Oracle Linux 6", "product_id": "Oracle-Linux-6", "product_identification_helper": { "cpe": "cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Oracle Linux" } ], "category": "vendor", "name": "Oracle Corporation" }, { "branches": [ { "branches": [ { "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-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-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.els1.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-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": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-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": "Oracle-Linux-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 Oracle Linux 6", "product_id": "Oracle-Linux-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": "Oracle-Linux-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 Oracle Linux 6", "product_id": "Oracle-Linux-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": "Oracle-Linux-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 Oracle Linux 6", "product_id": "Oracle-Linux-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": "Oracle-Linux-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 Oracle Linux 6", "product_id": "Oracle-Linux-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": "Oracle-Linux-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-28831", "cwe": { "id": "CWE-755", "name": "Improper Handling of Exceptional Conditions" }, "notes": [ { "category": "description", "text": "decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.", "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": [ "Oracle-Linux-6:busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "Oracle-Linux-6:busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "Oracle-Linux-6:busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "Oracle-Linux-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "Oracle-Linux-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "Oracle-Linux-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-2021-28831" }, { "category": "external", "summary": "https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd", "url": "https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd" }, { "category": "external", "summary": "https://lists.debian.org/debian-lts-announce/2021/04/msg00001.html", "url": "https://lists.debian.org/debian-lts-announce/2021/04/msg00001.html" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UDQGJRECXFS5EZVDH2OI45FMO436AC4/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UDQGJRECXFS5EZVDH2OI45FMO436AC4/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/" }, { "category": "external", "summary": "https://security.gentoo.org/glsa/202105-09", "url": "https://security.gentoo.org/glsa/202105-09" }, { "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" }, { "category": "external", "summary": "https://security.netapp.com/advisory/ntap-20250509-0005/", "url": "https://security.netapp.com/advisory/ntap-20250509-0005/" } ], "release_date": "2021-03-19T05:15:00Z", "scores": [ { "cvss_v2": { "accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "products": [ "Oracle-Linux-6:busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "Oracle-Linux-6:busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "Oracle-Linux-6:busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "Oracle-Linux-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "Oracle-Linux-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "Oracle-Linux-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-06-12T13:07:16.432547Z", "details": "Not affected: the bug in decompress_gunzip.c was introduced in BusyBox 1.32.0 and affects only 1.32.0–1.32.1; BusyBox 1.15.1 predates this change and does not contain the vulnerable code path. This assessment matches vendor guidance that marks the CVE as not applicable to their releases.", "product_ids": [ "Oracle-Linux-6:busybox-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "Oracle-Linux-6:busybox-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "Oracle-Linux-6:busybox-1:1.15.1-21.el6_6.tuxcare.els3.x86_64", "Oracle-Linux-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els1.x86_64", "Oracle-Linux-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els2.x86_64", "Oracle-Linux-6:busybox-petitboot-1:1.15.1-21.el6_6.tuxcare.els3.x86_64" ] } ] } ] }