{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-1939 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-1939 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-1939 is a critical vulnerability in Apache NuttX (incubating), published on 12 May 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-2020-1939 and fix it if it is affected.\n\nWhat it is: CVE-2020-1939 is a critical vulnerability in Apache NuttX (incubating), published on 12 May 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-2020-1939 in the wild and no public exploit code.\n\nAffected product: Apache NuttX (incubating). 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-2020-1939/ (Markdown: https://insights.sbomify.com/CVE-2020-1939/index.md)","id":"CVE-2020-1939","markdown":"https://insights.sbomify.com/CVE-2020-1939/index.md","name":"CVE-2020-1939","record":{"aliases":["GHSA-cxvf-qrfm-r86m"],"analysis":{"component_type":"operating_system","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"NuttX RTOS FTP daemon","requires_auth":"none","summary":"A NULL pointer dereference in the optional ftpd component of NuttX RTOS allows attackers to cause a denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"nuttx","vendor":"apache"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","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-476","name":"NULL Pointer Dereference"}],"description":"The Apache NuttX (Incubating) project provides an optional separate \"apps\" repository which contains various optional components and example programs. One of these, ftpd, had a NULL pointer dereference bug. The NuttX RTOS itself is not affected. Users of the optional apps repository are affected only if they have enabled ftpd. Versions 6.15 to 8.2 are affected.","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":"Null dereference in Apache NuttX (incubating)","id":"CVE-2020-1939","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2020"},"n_packages":0,"n_references":1,"next":{"headline":"Improper Removal of Sensitive Information Before Storage or Transfer in Apache Jackrabbit Oak","id":"CVE-2020-1940"},"packages":[],"prev":{"headline":"Apache Tomcat Improper Privilege Management","id":"CVE-2020-1938"},"products":["Apache NuttX (incubating)"],"published":"2020-05-12","related":[{"cvss_score":9.8,"headline":"Apache NuttX RTOS: tools/bdf-converter.: tools/bdf-converter: Fix loop termination condition.","id":"CVE-2025-47868","kev_date_added":null,"published":"2025-06-16"},{"cvss_score":9.8,"headline":"Apache NuttX RTOS: examples/xmlrpc: Fix calls buffers size.","id":"CVE-2025-47869","kev_date_added":null,"published":"2025-06-16"},{"cvss_score":9.8,"headline":"Apache NuttX RTOS: NuttX Bluetooth Stack HCI and UART DoS/RCE Vulnerabilities.","id":"CVE-2025-35003","kev_date_added":null,"published":"2025-05-26"},{"cvss_score":9.8,"headline":"malloc, realloc and memalign implementations are vulnerable to integer wrap-arounds","id":"CVE-2021-26461","kev_date_added":null,"published":"2021-06-21"},{"cvss_score":9.8,"headline":"Apache NuttX (incubating) Out of Bound Write from invalid fragmentation offset value specified in the IP header","id":"CVE-2020-17529","kev_date_added":null,"published":"2020-12-09"},{"cvss_score":9.1,"headline":"Apache NuttX (incubating) Out of Bound Write from invalid TCP Urgent length","id":"CVE-2020-17528","kev_date_added":null,"published":"2020-12-09"}],"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":["n/a"]},"summary":"A NULL pointer dereference in the optional ftpd component of NuttX RTOS allows attackers to cause a denial of service.","url":"https://insights.sbomify.com/CVE-2020-1939/"}