{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-4043 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-4043 is a medium-severity vulnerability in Debian Debian Linux, published on 4 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-4043 and fix it if it is affected.\n\nWhat it is: CVE-2021-4043 is a medium-severity vulnerability in Debian Debian Linux, published on 4 Feb 2022. 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-2021-4043 in the wild and no public exploit code.\n\nAffected product: Debian Debian Linux. 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-2021-4043/ (Markdown: https://insights.sbomify.com/CVE-2021-4043/index.md)","id":"CVE-2021-4043","markdown":"https://insights.sbomify.com/CVE-2021-4043/index.md","name":"CVE-2021-4043","record":{"aliases":["DEBIAN-CVE-2021-4043","GHSA-jm63-cmh5-jrcj"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"GPAC multimedia library","requires_auth":"none","summary":"A NULL pointer dereference in the GPAC library allows attackers to cause a denial of service via crafted media files.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"@huntrdev","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"gpac","vendor":"gpac"}],"cvss":{"score":5.8,"severity":"medium","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","version":"3.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"NULL Pointer Dereference in GitHub repository gpac/gpac prior to 1.1.0.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2022-01-30","github_poc":1,"max_poc_stars":29,"metasploit":0,"nuclei":0,"refs":[{"date":"2022-01-30T13:42:16Z","kind":"github_poc","ref":"https://github.com/cyberark/PwnKit-Hunter","stars":29,"title":"PwnKit-Hunter is here to help you check if your systems are vulnerable to CVE-2021-4043, a.k.a. PwnKit"}],"tier":"poc_unverified"},"has_fix":true,"headline":"NULL Pointer Dereference in gpac/gpac","id":"CVE-2021-4043","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","gpac:gpac"],"type":"null_dereference","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Invalid handling of X509_verify_cert() internal errors in libssl","id":"CVE-2021-4044"},"packages":[],"prev":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2021-4042"},"products":["gpac/gpac"],"published":"2022-02-04","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-11-08","vendors":["gpac"]},"summary":"A NULL pointer dereference in the GPAC library allows attackers to cause a denial of service via crafted media files.","url":"https://insights.sbomify.com/CVE-2021-4043/"}