{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-21839 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-21839 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-21839 is a medium-severity denial of service vulnerability in Gnu Libredwg, published on 17 May 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-2020-21839 and fix it if it is affected.\n\nWhat it is: CVE-2020-21839 is a medium-severity denial of service vulnerability in Gnu Libredwg, published on 17 May 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-2020-21839 in the wild and no public exploit code.\n\nAffected product: Gnu Libredwg. 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-2020-21839/ (Markdown: https://insights.sbomify.com/CVE-2020-21839/index.md)","id":"CVE-2020-21839","markdown":"https://insights.sbomify.com/CVE-2020-21839/index.md","name":"CVE-2020-21839","record":{"aliases":["GHSA-j6c4-9599-77v8"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"DWG file library","requires_auth":"none","summary":"Crafted DWG files cause a memory leak in GNU LibreDWG, potentially leading to resource exhaustion and denial of service.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"libredwg","vendor":"gnu"}],"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-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"An issue was discovered in GNU LibreDWG 0.10. Crafted input will lead to an memory leak in dwg_decode_eed ../../src/decode.c:3638.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Denial of service in n/a","id":"CVE-2020-21839","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"gnu:libredwg","products":["gnu:libredwg"],"type":"denial_of_service","year":"2020"},"n_packages":0,"n_references":2,"next":{"headline":"Memory corruption in n/a","id":"CVE-2020-21840"},"packages":[],"prev":{"headline":"Memory corruption in n/a","id":"CVE-2020-21838"},"products":["n/a"],"published":"2021-05-17","related":[{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2022-35164","kev_date_added":null,"published":"2022-08-18"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2021-28237","kev_date_added":null,"published":"2021-12-02"},{"cvss_score":9.8,"headline":"Null dereference in n/a","id":"CVE-2019-20914","kev_date_added":null,"published":"2020-07-16"},{"cvss_score":9.1,"headline":"Memory corruption in n/a","id":"CVE-2019-9774","kev_date_added":null,"published":"2019-03-14"},{"cvss_score":9.1,"headline":"Information disclosure in n/a","id":"CVE-2019-9775","kev_date_added":null,"published":"2019-03-14"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2023-36271","kev_date_added":null,"published":"2023-06-23"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2023-36272","kev_date_added":null,"published":"2023-06-23"}],"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":"2026-07-09","vendors":["n/a"]},"summary":"Crafted DWG files cause a memory leak in GNU LibreDWG, potentially leading to resource exhaustion and denial of service.","url":"https://insights.sbomify.com/CVE-2020-21839/"}