{"answers":{"affected":"It affects 6 products.","exploited":"There is no known exploitation of CVE-2020-3931 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-3931 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-3931 is a critical memory corruption vulnerability in GeoVision Door Access Control Device, published on 8 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-3931 and fix it if it is affected.\n\nWhat it is: CVE-2020-3931 is a critical memory corruption vulnerability in GeoVision Door Access Control Device, published on 8 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-3931 in the wild and no public exploit code.\n\nAffected product: GeoVision Door Access Control Device. 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-2020-3931/ (Markdown: https://insights.sbomify.com/CVE-2020-3931/index.md)","id":"CVE-2020-3931","markdown":"https://insights.sbomify.com/CVE-2020-3931/index.md","name":"CVE-2020-3931","record":{"aliases":["GHSA-j9mx-25jx-xgrh"],"analysis":{"component_type":"iot_embedded","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Door Access Control Device","requires_auth":"none","summary":"An unauthenticated remote attacker can execute arbitrary commands via a buffer overflow in GeoVision Door Access Control devices.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"twcert","cpe":[{"product":"gv-as1010_firmware","vendor":"geovision"},{"product":"gv-as210_firmware","vendor":"geovision"},{"product":"gv-as410_firmware","vendor":"geovision"},{"product":"gv-as810_firmware","vendor":"geovision"},{"product":"gv-gf1921_firmware","vendor":"geovision"},{"product":"gv-gf1922_firmware","vendor":"geovision"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"Buffer overflow exists in Geovision Door Access Control device family, an unauthenticated remote attacker can execute arbitrary command.","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":"GeoVision Door Access Control Device - Buffer overflow vulnerability","id":"CVE-2020-3931","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2020"},"n_packages":0,"n_references":2,"next":{"headline":"Draytek VigorAP910C - Information Leakage","id":"CVE-2020-3932"},"packages":[],"prev":{"headline":"GeoVision Door Access Control Device - Information disclosure vulnerability","id":"CVE-2020-3930"},"products":["Door Access Control Device"],"published":"2020-07-08","related":[],"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":"2024-09-16","vendors":["GeoVision"]},"summary":"An unauthenticated remote attacker can execute arbitrary commands via a buffer overflow in GeoVision Door Access Control devices.","url":"https://insights.sbomify.com/CVE-2020-3931/"}