{"answers":{"affected":"1 open source package ship an affected version, including php.","exploited":"There is no known exploitation of OSV-2021-455 in the wild and no public exploit code.","fix":"No fix has been published for OSV-2021-455 yet. Limit exposure of the affected software until one is available.","what":"OSV-2021-455 is an use after free vulnerability in php, published on 28 Feb 2021."},"fix_prompt":"Check this codebase for OSV-2021-455 and fix it if it is affected.\n\nWhat it is: OSV-2021-455 is an use after free vulnerability in php, published on 28 Feb 2021. \nExploitation: There is no known exploitation of OSV-2021-455 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- php (OSS-Fuzz): affected all versions; no fix listed\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/OSV-2021-455/ (Markdown: https://insights.sbomify.com/OSV-2021-455/index.md)","id":"OSV-2021-455","markdown":"https://insights.sbomify.com/OSV-2021-455/index.md","name":"OSV-2021-455","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"unknown","non_default_config":false,"product_category":"PHP engine","requires_auth":"none","summary":"A heap-use-after-free in the PHP engine's hash iterator allows attackers to potentially execute code or cause denial of service.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31423\n\n```\nCrash type: Heap-use-after-free READ 1\nCrash state:\nzend_hash_iterator_pos_ex\nZEND_FE_FETCH_RW_SPEC_VAR_HANDLER\nfuzzer_execute_ex\n```","ecosystems":["OSS-Fuzz"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Heap-use-after-free in zend_hash_iterator_pos_ex","id":"OSV-2021-455","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"OSS-Fuzz","product":null,"products":[],"type":"use_after_free","year":"2021"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"OSS-Fuzz","fixed":[],"introduced":[],"last_affected":[],"package":"php","purl":"pkg:generic/php","source":"OSV-2021-455"}],"products":null,"published":"2021-02-28","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"OSS-Fuzz","prefix":"OSV"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"A heap-use-after-free in the PHP engine's hash iterator allows attackers to potentially execute code or cause denial of service.","url":"https://insights.sbomify.com/OSV-2021-455/"}