{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-4021 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-4021 is a high-severity denial of service vulnerability in Radare Radare2, published on 24 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-2021-4021 and fix it if it is affected.\n\nWhat it is: CVE-2021-4021 is a high-severity denial of service vulnerability in Radare Radare2, published on 24 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-2021-4021 in the wild and no public exploit code.\n\nAffected product: Radare Radare2. 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-2021-4021/ (Markdown: https://insights.sbomify.com/CVE-2021-4021/index.md)","id":"CVE-2021-4021","markdown":"https://insights.sbomify.com/CVE-2021-4021/index.md","name":"CVE-2021-4021","record":{"aliases":["GHSA-4g55-4fxv-2g82","UBUNTU-CVE-2021-4021"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Radare2 reverse engineering tool","requires_auth":"none","summary":"Attackers can cause denial of service in Radare2 by mapping huge zero-filled sections in MIPS ELF64 binaries, leading to uncontrolled resource consumption.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"fedora","cpe":[{"product":"radare2","vendor":"radare"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-834","name":"Excessive Iteration"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"A vulnerability was found in Radare2 in versions prior to 5.6.2, 5.6.0, 5.5.4 and 5.5.2. Mapping a huge section filled with zeros of an ELF64 binary for MIPS architecture can lead to uncontrolled resource consumption and DoS.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Denial of service in radare2","id":"CVE-2021-4021","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"radare:radare2","products":["radare:radare2"],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Use after free in rizin","id":"CVE-2021-4022"},"packages":[],"prev":{"headline":"Cross-site Scripting (XSS) - Stored in meetecho/janus-gateway","id":"CVE-2021-4020"},"products":["radare2"],"published":"2022-02-24","related":[{"cvss_score":10,"headline":"Buffer Overflow and Potential Code Execution in Radare2","id":"CVE-2025-1864","kev_date_added":null,"published":"2025-03-03"},{"cvss_score":10,"headline":"Out-of-bounds Write in radare2","id":"CVE-2025-1744","kev_date_added":null,"published":"2025-02-28"},{"cvss_score":10,"headline":"Denial of service in radare2","id":"CVE-2021-32494","kev_date_added":null,"published":"2023-07-07"},{"cvss_score":10,"headline":"Use after free in radare2","id":"CVE-2021-32495","kev_date_added":null,"published":"2023-07-07"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-29646","kev_date_added":null,"published":"2024-12-17"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-46569","kev_date_added":null,"published":"2023-10-28"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-46570","kev_date_added":null,"published":"2023-10-28"}],"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":"2024-08-03","vendors":["n/a"]},"summary":"Attackers can cause denial of service in Radare2 by mapping huge zero-filled sections in MIPS ELF64 binaries, leading to uncontrolled resource consumption.","url":"https://insights.sbomify.com/CVE-2021-4021/"}