{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-27478 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27478 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27478 is a high-severity vulnerability in EIPStackGroup OpENer EtherNet/IP, published on 12 May 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-2021-27478 and fix it if it is affected.\n\nWhat it is: CVE-2021-27478 is a high-severity vulnerability in EIPStackGroup OpENer EtherNet/IP, published on 12 May 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-2021-27478 in the wild and no public exploit code.\n\nAffected product: EIPStackGroup OpENer EtherNet/IP. 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-2021-27478/ (Markdown: https://insights.sbomify.com/CVE-2021-27478/index.md)","id":"CVE-2021-27478","markdown":"https://insights.sbomify.com/CVE-2021-27478/index.md","name":"CVE-2021-27478","record":{"aliases":["GHSA-3c24-g4gm-98v9"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"EtherNet/IP stack","requires_auth":"none","summary":"A crafted packet can cause a denial-of-service condition in EIPStackGroup OpENer EtherNet/IP due to incorrect numeric type conversion.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"opener","vendor":"opener_project"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-681","name":"Incorrect Conversion between Numeric Types"}],"description":"A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may cause a denial-of-service condition.","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":"EIPStackGroup OpENer Ethernet/IP Incorrect Conversion between Numeric Types","id":"CVE-2021-27478","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Cross-site scripting in ZOLL Defibrillator Dashboard","id":"CVE-2021-27479"},"packages":[],"prev":{"headline":"Memory corruption in JTEKT Corporation TOYOPUC PLC","id":"CVE-2021-27477"},"products":["OpENer EtherNet/IP"],"published":"2022-05-12","related":[{"cvss_score":10,"headline":"Memory corruption in OpENer","id":"CVE-2022-43604","kev_date_added":null,"published":"2023-03-16"},{"cvss_score":10,"headline":"Memory corruption in OpENer","id":"CVE-2022-43605","kev_date_added":null,"published":"2023-03-16"},{"cvss_score":9.8,"headline":"Integer overflow in n/a","id":"CVE-2026-51540","kev_date_added":null,"published":"2026-07-13"},{"cvss_score":9.8,"headline":"Memory corruption in EIP Stack Group","id":"CVE-2020-13556","kev_date_added":null,"published":"2020-12-11"},{"cvss_score":9.1,"headline":"Integer overflow in n/a","id":"CVE-2026-51536","kev_date_added":null,"published":"2026-07-13"},{"cvss_score":9.1,"headline":"Memory corruption in n/a","id":"CVE-2026-51537","kev_date_added":null,"published":"2026-07-13"},{"cvss_score":9.1,"headline":"Auth bypass in n/a","id":"CVE-2026-51538","kev_date_added":null,"published":"2026-07-13"}],"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-16","vendors":["EIPStackGroup"]},"summary":"A crafted packet can cause a denial-of-service condition in EIPStackGroup OpENer EtherNet/IP due to incorrect numeric type conversion.","url":"https://insights.sbomify.com/CVE-2021-27478/"}