{"answers":{"affected":"1 open source package ship an affected version, including frr.","exploited":"There is no known exploitation of OSV-2021-1127 in the wild and no public exploit code.","fix":"No fix has been published for OSV-2021-1127 yet. Limit exposure of the affected software until one is available.","what":"OSV-2021-1127 is an use after free vulnerability in frr, published on 15 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for OSV-2021-1127 and fix it if it is affected.\n\nWhat it is: OSV-2021-1127 is an use after free vulnerability in frr, published on 15 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of OSV-2021-1127 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- frr (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-2021-1127/ (Markdown: https://insights.sbomify.com/OSV-2021-1127/index.md)","id":"OSV-2021-1127","markdown":"https://insights.sbomify.com/OSV-2021-1127/index.md","name":"OSV-2021-1127","record":{"aliases":[],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"FRRouting Zebra daemon","requires_auth":"none","summary":"A heap-use-after-free in the Zebra daemon's next-hop group hash lookup can cause crashes or potential code execution, affecting network routing infrastructure.","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=37164\n\n```\nCrash type: Heap-use-after-free READ 4\nCrash state:\nzebra_nhg_hash_equal\nhash_get\nhash_lookup\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 zebra_nhg_hash_equal","id":"OSV-2021-1127","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":"frr","purl":"pkg:generic/frr","source":"OSV-2021-1127"}],"products":null,"published":"2021-08-15","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 Zebra daemon's next-hop group hash lookup can cause crashes or potential code execution, affecting network routing infrastructure.","url":"https://insights.sbomify.com/OSV-2021-1127/"}