{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21869 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21869 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21869 is a high-severity unsafe deserialization vulnerability in CODESYS, published on 25 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-21869 and fix it if it is affected.\n\nWhat it is: CVE-2021-21869 is a high-severity unsafe deserialization vulnerability in CODESYS, published on 25 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-21869 in the wild and no public exploit code.\n\nAffected product: CODESYS. 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-2021-21869/ (Markdown: https://insights.sbomify.com/CVE-2021-21869/index.md)","id":"CVE-2021-21869","markdown":"https://insights.sbomify.com/CVE-2021-21869/index.md","name":"CVE-2021-21869","record":{"aliases":["GHSA-5vxq-fv88-x9jq"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"CODESYS Development System","requires_auth":"none","summary":"An attacker can execute arbitrary commands by providing a specially crafted file to the CODESYS Development System due to unsafe deserialization.","user_interaction":"required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"talos","cpe":[{"product":"codesys","vendor":"codesys"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"An unsafe deserialization vulnerability exists in the Engine.plugin ProfileInformation ProfileData functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.","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":"Deserialization in CODESYS","id":"CVE-2021-21869","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Use after free in Foxit","id":"CVE-2021-21870"},"packages":[],"prev":{"headline":"Deserialization in CODESYS","id":"CVE-2021-21868"},"products":["CODESYS"],"published":"2021-08-25","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-2021-21867","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":"2024-08-03","vendors":["n/a"]},"summary":"An attacker can execute arbitrary commands by providing a specially crafted file to the CODESYS Development System due to unsafe deserialization.","url":"https://insights.sbomify.com/CVE-2021-21869/"}