{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-21002 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21002 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21002 is a high-severity denial of service vulnerability in Phoenix Contact FL COMSERVER, published on 25 Jun 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-2021-21002 and fix it if it is affected.\n\nWhat it is: CVE-2021-21002 is a high-severity denial of service vulnerability in Phoenix Contact FL COMSERVER, published on 25 Jun 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-2021-21002 in the wild and no public exploit code.\n\nAffected product: Phoenix Contact FL COMSERVER. 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-2021-21002/ (Markdown: https://insights.sbomify.com/CVE-2021-21002/index.md)","id":"CVE-2021-21002","markdown":"https://insights.sbomify.com/CVE-2021-21002/index.md","name":"CVE-2021-21002","record":{"aliases":["GHSA-wc86-7c83-q7g5"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Industrial network device","requires_auth":"none","summary":"An attacker can cause a temporary denial of service in Phoenix Contact FL COMSERVER UNI devices by sending invalid Modbus exception responses.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERTVDE","cpe":[{"product":"fl_comserver_uni_232\\/422\\/485-t_firmware","vendor":"phoenixcontact"},{"product":"fl_comserver_uni_232\\/422\\/485_firmware","vendor":"phoenixcontact"}],"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-772","name":"Missing Release of Resource after Effective Lifetime"}],"description":"In Phoenix Contact FL COMSERVER UNI in versions \u003c 2.40 a invalid Modbus exception response can lead to a temporary denial of service.","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":"Denial of Service in Phoenix Contact FL COMSERVER UNI products","id":"CVE-2021-21002","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":"Denial of Service Vulnerability in Phoenix Contact FL SWITCH SMCS series products","id":"CVE-2021-21003"},"packages":[],"prev":{"headline":"WAGO: PFC200 Access to files outside the home directory","id":"CVE-2021-21001"},"products":["FL COMSERVER"],"published":"2021-06-25","related":[],"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":"2024-09-17","vendors":["Phoenix Contact"]},"summary":"An attacker can cause a temporary denial of service in Phoenix Contact FL COMSERVER UNI devices by sending invalid Modbus exception responses.","url":"https://insights.sbomify.com/CVE-2021-21002/"}