{"answers":{"affected":"It affects 27 products.","exploited":"There is no known exploitation of CVE-2021-21000 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21000 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21000 is a medium-severity denial of service vulnerability in WAGO Series Ethernet Controller, published on 24 May 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-2021-21000 and fix it if it is affected.\n\nWhat it is: CVE-2021-21000 is a medium-severity denial of service vulnerability in WAGO Series Ethernet Controller, published on 24 May 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-2021-21000 in the wild and no public exploit code.\n\nAffected product: WAGO Series Ethernet Controller. 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-2021-21000/ (Markdown: https://insights.sbomify.com/CVE-2021-21000/index.md)","id":"CVE-2021-21000","markdown":"https://insights.sbomify.com/CVE-2021-21000/index.md","name":"CVE-2021-21000","record":{"aliases":["GHSA-2ffw-fg59-p3gv"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"WAGO PFC200 Controller","requires_auth":"none","summary":"An attacker with network access can cause a denial of service on the login service of WAGO PFC200 controllers by sending specially crafted packets.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERTVDE","cpe":[{"product":"750-8202_firmware","vendor":"wago"},{"product":"750-8203_firmware","vendor":"wago"},{"product":"750-8204_firmware","vendor":"wago"},{"product":"750-8206_firmware","vendor":"wago"},{"product":"750-8207_firmware","vendor":"wago"},{"product":"750-8208_firmware","vendor":"wago"},{"product":"750-8210_firmware","vendor":"wago"},{"product":"750-8211_firmware","vendor":"wago"},{"product":"750-8212_firmware","vendor":"wago"},{"product":"750-8213_firmware","vendor":"wago"},{"product":"750-8214_firmware","vendor":"wago"},{"product":"750-8216_firmware","vendor":"wago"},{"product":"750-8217_firmware","vendor":"wago"},{"product":"750-823_firmware","vendor":"wago"},{"product":"750-829_firmware","vendor":"wago"},{"product":"750-831_firmware","vendor":"wago"},{"product":"750-832_firmware","vendor":"wago"},{"product":"750-852_firmware","vendor":"wago"},{"product":"750-862_firmware","vendor":"wago"},{"product":"750-880_firmware","vendor":"wago"},{"product":"750-881_firmware","vendor":"wago"},{"product":"750-882_firmware","vendor":"wago"},{"product":"750-885_firmware","vendor":"wago"},{"product":"750-889_firmware","vendor":"wago"},{"product":"750-890_firmware","vendor":"wago"},{"product":"750-891_firmware","vendor":"wago"},{"product":"750-893_firmware","vendor":"wago"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.","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":"WAGO: PFC200 Denial of Service due to the number of connections to the runtime","id":"CVE-2021-21000","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":"WAGO: PFC200 Access to files outside the home directory","id":"CVE-2021-21001"},"packages":[],"prev":{"headline":"WEIDMUELLER: Accidentally open network port in u-controls and IoT-Gateways","id":"CVE-2021-20999"},"products":["Series Ethernet Controller","Series PFC200 Controller"],"published":"2021-05-24","related":[{"cvss_score":9.1,"headline":"WAGO: PFC200 Access to files outside the home directory","id":"CVE-2021-21001","kev_date_added":null,"published":"2021-05-24"}],"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":["WAGO"]},"summary":"An attacker with network access can cause a denial of service on the login service of WAGO PFC200 controllers by sending specially crafted packets.","url":"https://insights.sbomify.com/CVE-2021-21000/"}