{ "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/ubuntu18.04els/vex/2021/cve-2021-29463-els_os-ubuntu18_04els.json" } ], "tracking": { "current_release_date": "2026-08-28T16:55:34Z", "generator": { "date": "2026-08-28T16:55:34Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2021-29463-ELS_OS-UBUNTU18.04ELS", "initial_release_date": "2021-04-30T19:15:00Z", "revision_history": [ { "date": "2021-04-30T19:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-08-28T16:55:34Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2021-29463" }, "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" }, { "branches": [ { "category": "product_version", "name": "exiv2-0:0.25-3.1ubuntu0.18.04.11.amd64", "product": { "name": "exiv2-0:0.25-3.1ubuntu0.18.04.11.amd64", "product_id": "exiv2-0:0.25-3.1ubuntu0.18.04.11.amd64", "product_identification_helper": { "purl": "pkg:deb/ubuntu/exiv2@0.25-3.1ubuntu0.18.04.11?arch=amd64" } } }, { "category": "product_version", "name": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11.amd64", "product": { "name": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11.amd64", "product_id": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11.amd64", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libexiv2-14@0.25-3.1ubuntu0.18.04.11?arch=amd64" } } }, { "category": "product_version", "name": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11.amd64", "product": { "name": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11.amd64", "product_id": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11.amd64", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libexiv2-dev@0.25-3.1ubuntu0.18.04.11?arch=amd64" } } } ], "category": "architecture", "name": "amd64" }, { "branches": [ { "category": "product_version", "name": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11.all", "product": { "name": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11.all", "product_id": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11.all", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libexiv2-doc@0.25-3.1ubuntu0.18.04.11?arch=all" } } } ], "category": "architecture", "name": "all" } ], "category": "vendor", "name": "Canonical Ltd." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "exiv2-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "product": { "name": "exiv2-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "product_id": "exiv2-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/exiv2@0.25-3.1ubuntu0.18.04.11%2Btuxcare.els2?arch=amd64" } } }, { "category": "product_version", "name": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "product": { "name": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "product_id": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/libexiv2-14@0.25-3.1ubuntu0.18.04.11%2Btuxcare.els2?arch=amd64" } } }, { "category": "product_version", "name": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "product": { "name": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "product_id": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/libexiv2-dev@0.25-3.1ubuntu0.18.04.11%2Btuxcare.els2?arch=amd64" } } } ], "category": "architecture", "name": "amd64" }, { "branches": [ { "category": "product_version", "name": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.all", "product": { "name": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.all", "product_id": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.all", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/libexiv2-doc@0.25-3.1ubuntu0.18.04.11%2Btuxcare.els2?arch=all" } } } ], "category": "architecture", "name": "all" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "exiv2-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:exiv2-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64" }, "product_reference": "exiv2-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "exiv2-0:0.25-3.1ubuntu0.18.04.11.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:exiv2-0:0.25-3.1ubuntu0.18.04.11.amd64" }, "product_reference": "exiv2-0:0.25-3.1ubuntu0.18.04.11.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.all as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.all" }, "product_reference": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.all", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11.all as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11.all" }, "product_reference": "libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11.all", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:libexiv2-14-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64" }, "product_reference": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:libexiv2-14-0:0.25-3.1ubuntu0.18.04.11.amd64" }, "product_reference": "libexiv2-14-0:0.25-3.1ubuntu0.18.04.11.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64" }, "product_reference": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "relates_to_product_reference": "Ubuntu-18" }, { "category": "default_component_of", "full_product_name": { "name": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11.amd64" }, "product_reference": "libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11.amd64", "relates_to_product_reference": "Ubuntu-18" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-29463", "cwe": { "id": "CWE-125", "name": "Out-of-bounds Read" }, "notes": [ { "category": "description", "text": "Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. The out-of-bounds read is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `insert`. The bug is fixed in version v0.27.4.", "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-18:exiv2-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "Ubuntu-18:exiv2-0:0.25-3.1ubuntu0.18.04.11.amd64", "Ubuntu-18:libexiv2-14-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "Ubuntu-18:libexiv2-14-0:0.25-3.1ubuntu0.18.04.11.amd64", "Ubuntu-18:libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "Ubuntu-18:libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11.amd64", "Ubuntu-18:libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.all", "Ubuntu-18:libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11.all" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2021-29463" }, { "category": "external", "summary": "https://github.com/Exiv2/exiv2/commit/783b3a6ff15ed6f82a8f8e6c8a6f3b84a9b04d4b", "url": "https://github.com/Exiv2/exiv2/commit/783b3a6ff15ed6f82a8f8e6c8a6f3b84a9b04d4b" }, { "category": "external", "summary": "https://github.com/Exiv2/exiv2/security/advisories/GHSA-5p8g-9xf3-gfrr", "url": "https://github.com/Exiv2/exiv2/security/advisories/GHSA-5p8g-9xf3-gfrr" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3HKXR6JOVKMBE4HY4FDXNVZGNCQG6T3/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3HKXR6JOVKMBE4HY4FDXNVZGNCQG6T3/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NDMZTVQAZSMLPTDVDYLBHAAF7I5QXVYQ/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NDMZTVQAZSMLPTDVDYLBHAAF7I5QXVYQ/" }, { "category": "external", "summary": "https://security.gentoo.org/glsa/202312-06", "url": "https://security.gentoo.org/glsa/202312-06" } ], "release_date": "2021-04-30T19:15:00Z", "remediations": [ { "category": "no_fix_planned", "date": "2026-08-18T14:37:13.398870Z", "details": "This flaw is only reachable when Exiv2 is explicitly used to write metadata to a crafted image (e.g., via a write/insert operation), making it a local, user‑interaction–dependent issue that results solely in a process crash with no confidentiality or integrity impact. The vulnerable path is not exercised during normal metadata reads or image viewing, and any failure is confined to the Exiv2‑invoking process rather than system services. Given these constraints, the practical exploitation risk in centrally managed server/VM environments is low and the issue can be safely deprioritized.", "product_ids": [ "Ubuntu-18:exiv2-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "Ubuntu-18:exiv2-0:0.25-3.1ubuntu0.18.04.11.amd64", "Ubuntu-18:libexiv2-14-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "Ubuntu-18:libexiv2-14-0:0.25-3.1ubuntu0.18.04.11.amd64", "Ubuntu-18:libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "Ubuntu-18:libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11.amd64", "Ubuntu-18:libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.all", "Ubuntu-18:libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11.all" ] } ], "scores": [ { "cvss_v2": { "accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1" }, "products": [ "Ubuntu-18:exiv2-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "Ubuntu-18:exiv2-0:0.25-3.1ubuntu0.18.04.11.amd64", "Ubuntu-18:libexiv2-14-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "Ubuntu-18:libexiv2-14-0:0.25-3.1ubuntu0.18.04.11.amd64", "Ubuntu-18:libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.amd64", "Ubuntu-18:libexiv2-dev-0:0.25-3.1ubuntu0.18.04.11.amd64", "Ubuntu-18:libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11+tuxcare.els2.all", "Ubuntu-18:libexiv2-doc-0:0.25-3.1ubuntu0.18.04.11.all" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ] } ] }