{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-40439 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-40439 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-40439 is a medium-severity vulnerability in Apache Openoffice, published on 7 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-40439 and fix it if it is affected.\n\nWhat it is: CVE-2021-40439 is a medium-severity vulnerability in Apache Openoffice, published on 7 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-40439 in the wild and no public exploit code.\n\nAffected product: Apache Openoffice. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-40439/ (Markdown: https://insights.sbomify.com/CVE-2021-40439/index.md)","id":"CVE-2021-40439","markdown":"https://insights.sbomify.com/CVE-2021-40439/index.md","name":"CVE-2021-40439","record":{"aliases":["GHSA-7579-q6rq-wf6r"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Office suite","requires_auth":"none","summary":"An attacker can cause a denial of service in Apache OpenOffice by exploiting an XML entity expansion vulnerability in the bundled expat library via crafted ODF files.","user_interaction":"required","vuln_class":"xxe"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"openoffice","vendor":"apache"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-611","name":"Improper Restriction of XML External Entity Reference"}],"description":"Apache OpenOffice has a dependency on expat software. Versions prior to 2.1.0 were subject to CVE-2013-0340 a \"Billion Laughs\" entity expansion denial of service attack and exploit via crafted XML files. ODF files consist of a set of XML files. All versions of Apache OpenOffice up to 4.1.10 are subject to this issue. expat in version 4.1.11 is patched.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Billion Laughs","id":"CVE-2021-40439","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"apache:openoffice","products":["apache:openoffice"],"type":"xxe","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"Microsoft Dynamics Business Central Cross-site Scripting Vulnerability","id":"CVE-2021-40440"},"packages":[],"prev":{"headline":"Apache HTTP Server-Side Request Forgery (SSRF)","id":"CVE-2021-40438"},"products":["Apache OpenOffice"],"published":"2021-10-07","related":[{"cvss_score":9.3,"headline":"Command injection in n/a","id":"CVE-2014-3524","kev_date_added":null,"published":"2014-08-26"},{"cvss_score":9.3,"headline":"Path traversal in n/a","id":"CVE-2010-3450","kev_date_added":null,"published":"2011-01-28"},{"cvss_score":9.3,"headline":"Use after free in n/a","id":"CVE-2010-3451","kev_date_added":null,"published":"2011-01-28"},{"cvss_score":9.3,"headline":"Use after free in n/a","id":"CVE-2010-3452","kev_date_added":null,"published":"2011-01-28"},{"cvss_score":9.3,"headline":"Memory corruption in n/a","id":"CVE-2010-3453","kev_date_added":null,"published":"2011-01-28"},{"cvss_score":9.3,"headline":"Memory corruption in n/a","id":"CVE-2010-3454","kev_date_added":null,"published":"2011-01-28"},{"cvss_score":9.3,"headline":"Memory corruption in n/a","id":"CVE-2010-4253","kev_date_added":null,"published":"2011-01-28"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["Apache Software Foundation"]},"summary":"An attacker can cause a denial of service in Apache OpenOffice by exploiting an XML entity expansion vulnerability in the bundled expat library via crafted ODF files.","url":"https://insights.sbomify.com/CVE-2021-40439/"}