{"answers":{"affected":"It affects 28 products.","exploited":"There is no known exploitation of CVE-2021-34583 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-34583 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-34583 is a high-severity memory corruption vulnerability in CODESYS V2, published on 26 Oct 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-2021-34583 and fix it if it is affected.\n\nWhat it is: CVE-2021-34583 is a high-severity memory corruption vulnerability in CODESYS V2, published on 26 Oct 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-2021-34583 in the wild and no public exploit code.\n\nAffected product: CODESYS V2. 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-2021-34583/ (Markdown: https://insights.sbomify.com/CVE-2021-34583/index.md)","id":"CVE-2021-34583","markdown":"https://insights.sbomify.com/CVE-2021-34583/index.md","name":"CVE-2021-34583","record":{"aliases":["GHSA-rx79-rgx5-5gqx"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"CODESYS V2 web server","requires_auth":"none","summary":"Crafted requests to the CODESYS V2 web server can trigger a heap-based buffer overflow, causing a denial-of-service crash.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERTVDE","cpe":[{"product":"codesys","vendor":"codesys"},{"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":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"Crafted web server requests may cause a heap-based buffer overflow and could therefore trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.","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":"CODESYS V2 web server: crafted requests could trigger a heap-based buffer overflow (DoS)","id":"CVE-2021-34583","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"CODESYS V2 web server: crafted requests could trigger a buffer over-read (DoS)","id":"CVE-2021-34584"},"packages":[],"prev":{"headline":"Phoenix Contact: FL MGUARD XSS through web-based management and REST API","id":"CVE-2021-34582"},"products":["CODESYS V2"],"published":"2021-10-26","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2019-16265","kev_date_added":null,"published":"2019-10-25"},{"cvss_score":9.1,"headline":"CODESYS V2 web server: crafted requests could trigger a buffer over-read (DoS)","id":"CVE-2021-34584","kev_date_added":null,"published":"2021-10-26"},{"cvss_score":8.8,"headline":"Deserialization in CODESYS","id":"CVE-2021-21869","kev_date_added":null,"published":"2021-08-25"},{"cvss_score":8.8,"headline":"Deserialization in CODESYS","id":"CVE-2021-21867","kev_date_added":null,"published":"2021-08-18"},{"cvss_score":8.8,"headline":"Deserialization in CODESYS","id":"CVE-2021-21868","kev_date_added":null,"published":"2021-08-18"},{"cvss_score":8.6,"headline":"Code injection in n/a","id":"CVE-2019-13538","kev_date_added":null,"published":"2019-09-17"},{"cvss_score":8.1,"headline":"CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service","id":"CVE-2021-34595","kev_date_added":null,"published":"2021-10-26"}],"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":["CODESYS"]},"summary":"Crafted requests to the CODESYS V2 web server can trigger a heap-based buffer overflow, causing a denial-of-service crash.","url":"https://insights.sbomify.com/CVE-2021-34583/"}