{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-43931 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-43931 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-43931 is a critical authentication bypass vulnerability in Distributed Data Systems WebHMI, published on 6 Dec 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-2021-43931 and fix it if it is affected.\n\nWhat it is: CVE-2021-43931 is a critical authentication bypass vulnerability in Distributed Data Systems WebHMI, published on 6 Dec 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-2021-43931 in the wild and no public exploit code.\n\nAffected product: Distributed Data Systems WebHMI. 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-2021-43931/ (Markdown: https://insights.sbomify.com/CVE-2021-43931/index.md)","id":"CVE-2021-43931","markdown":"https://insights.sbomify.com/CVE-2021-43931/index.md","name":"CVE-2021-43931","record":{"aliases":["GHSA-9p49-7vh4-82rx"],"analysis":{"component_type":"ics_ot","fix_type":"no_fix_stated","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"WebHMI portal","requires_auth":"none","summary":"Attackers can bypass the WebHMI portal authentication mechanism due to a primary weakness preceding the authentication error.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"webhmi_firmware","vendor":"webhmi"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"The authentication algorithm of the WebHMI portal is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Distributed Data Systems WebHM","id":"CVE-2021-43931","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Elcomplus SmartPtt Cross-site Scripting","id":"CVE-2021-43932"},"packages":[],"prev":{"headline":"Elcomplus SmartPtt Path Traversal","id":"CVE-2021-43930"},"products":["WebHMI"],"published":"2021-12-06","related":[{"cvss_score":10,"headline":"Distributed Data Systems WebHM","id":"CVE-2021-43936","kev_date_added":null,"published":"2021-12-06"},{"cvss_score":9.1,"headline":"Distributed Data Systems WebHMI OS Command Injection","id":"CVE-2022-2253","kev_date_added":null,"published":"2022-07-01"},{"cvss_score":6.2,"headline":"Distributed Data Systems WebHMI Cross-site Scripting","id":"CVE-2022-2254","kev_date_added":null,"published":"2022-07-01"}],"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":"2024-08-04","vendors":["Distributed Data Systems"]},"summary":"Attackers can bypass the WebHMI portal authentication mechanism due to a primary weakness preceding the authentication error.","url":"https://insights.sbomify.com/CVE-2021-43931/"}