{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-41531 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-41531 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-41531 is a high-severity denial of service vulnerability in NLnet Labs Routinator, published on 21 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-41531 and fix it if it is affected.\n\nWhat it is: CVE-2021-41531 is a high-severity denial of service vulnerability in NLnet Labs Routinator, published on 21 Sep 2021. 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-2021-41531 in the wild and no public exploit code.\n\nAffected product: NLnet Labs Routinator. 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-2021-41531/ (Markdown: https://insights.sbomify.com/CVE-2021-41531/index.md)","id":"CVE-2021-41531","markdown":"https://insights.sbomify.com/CVE-2021-41531/index.md","name":"CVE-2021-41531","record":{"aliases":["GHSA-mjc7-fwvm-67h4"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["security_bypass","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"RPKI validation software","requires_auth":"none","summary":"Attackers can disable Route Origin Validation on routers by causing Routinator to produce invalid RTR payloads, bypassing RPKI security checks.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"NLnet Labs","cpe":[{"product":"routinator","vendor":"nlnetlabs"}],"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:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"},{"id":"CWE-1288","name":"Improper Validation of Consistency within Input"}],"description":"NLnet Labs Routinator prior to 0.10.0 produces invalid RTR payload if an RPKI CA uses too large values in the max-length parameter in a ROA. This will lead to RTR clients such as routers to reject the RPKI data set, effectively disabling Route Origin Validation.","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":"Invalid RPKI data could disable Route Origin Validation on RTR clients.","id":"CVE-2021-41531","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Unauthenticated access to Ozone Recon HTTP endpoints","id":"CVE-2021-41532"},"packages":[],"prev":{"headline":"Denial of service in Forcepoint Next Generation Firewall","id":"CVE-2021-41530"},"products":["Routinator"],"published":"2021-09-21","related":[{"cvss_score":9.3,"headline":"Possible path traversal when storing RRDP responses","id":"CVE-2023-39916","kev_date_added":null,"published":"2023-09-13"},{"cvss_score":8.7,"headline":"Routinator crashes on specifically crafted RRDP XML files","id":"CVE-2026-49235","kev_date_added":null,"published":"2026-06-08"},{"cvss_score":8.3,"headline":"Routinator cache path traversal using rogue rsync URIs","id":"CVE-2026-49233","kev_date_added":null,"published":"2026-06-08"},{"cvss_score":8.2,"headline":"Routinator crashes on specifically crafted ASN strings in the API","id":"CVE-2026-49234","kev_date_added":null,"published":"2026-06-08"},{"cvss_score":7.5,"headline":"Crashes on parsing certain invalid RPKI objects","id":"CVE-2023-39915","kev_date_added":null,"published":"2023-09-13"},{"cvss_score":7.5,"headline":"Fatal error on incorrect base64 data in RRDP","id":"CVE-2022-3029","kev_date_added":null,"published":"2022-09-13"},{"cvss_score":7.5,"headline":"Infinite length chain of RRDP repositories","id":"CVE-2021-43172","kev_date_added":null,"published":"2021-11-09"}],"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":"2024-09-16","vendors":["NLnet Labs"]},"summary":"Attackers can disable Route Origin Validation on routers by causing Routinator to produce invalid RTR payloads, bypassing RPKI security checks.","url":"https://insights.sbomify.com/CVE-2021-41531/"}