{"answers":{"affected":"It affects 10 products.","exploited":"There is no known exploitation of CVE-2021-31345 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-31345 is a high-severity denial of service vulnerability in Siemens Capital Embedded AR Classic 431-422, published on 9 Nov 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-2021-31345 and fix it if it is affected.\n\nWhat it is: CVE-2021-31345 is a high-severity denial of service vulnerability in Siemens Capital Embedded AR Classic 431-422, published on 9 Nov 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-2021-31345 in the wild and no public exploit code.\n\nAffected product: Siemens Capital Embedded AR Classic 431-422. 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-2021-31345/ (Markdown: https://insights.sbomify.com/CVE-2021-31345/index.md)","id":"CVE-2021-31345","markdown":"https://insights.sbomify.com/CVE-2021-31345/index.md","name":"CVE-2021-31345","record":{"aliases":["A-207693368","ASB-A-207693368","GHSA-f3qp-9gxf-f3c8","M- MOLY00756840"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["denial_of_service","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Siemens industrial controller","requires_auth":"none","summary":"Attackers can cause denial of service or information leaks in Siemens industrial controllers by sending malformed UDP packets with unchecked length fields.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"apogee_modular_building_controller_firmware","vendor":"siemens"},{"product":"apogee_modular_equiment_controller_firmware","vendor":"siemens"},{"product":"apogee_pxc_compact_firmware","vendor":"siemens"},{"product":"apogee_pxc_modular_firmware","vendor":"siemens"},{"product":"capital_vstar","vendor":"siemens"},{"product":"nucleus_net","vendor":"siemens"},{"product":"nucleus_readystart_v3","vendor":"siemens"},{"product":"nucleus_source_code","vendor":"siemens"},{"product":"talon_tc_compact_firmware","vendor":"siemens"},{"product":"talon_tc_modular_firmware","vendor":"siemens"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-1284","name":"Improper Validation of Specified Quantity in Input"}],"description":"A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions \u003c V2303), PLUSCONTROL 1st Gen (All versions). The total length of an UDP payload (set in the IP header) is unchecked. This may lead to various side effects, including Information Leak and Denial-of-Service conditions, depending on a user-defined applications that runs on top of the UDP protocol. (FSMD-2021-0006)","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Denial of service in Capital Embedded AR Classic 431-422","id":"CVE-2021-31345","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":8,"next":{"headline":"Denial of service in Capital Embedded AR Classic 431-422","id":"CVE-2021-31346"},"packages":[],"prev":{"headline":"Other in Capital Embedded AR Classic 431-422","id":"CVE-2021-31344"},"products":["Capital Embedded AR Classic 431-422","Capital Embedded AR Classic R20-11","PLUSCONTROL 1st Gen"],"published":"2021-11-09","related":[{"cvss_score":9.8,"headline":"Memory corruption in APOGEE MBC (PPC) (BACnet)","id":"CVE-2021-31884","kev_date_added":null,"published":"2021-11-09"},{"cvss_score":9.8,"headline":"Memory corruption in APOGEE MBC (PPC) (BACnet)","id":"CVE-2021-31886","kev_date_added":null,"published":"2021-11-09"},{"cvss_score":8.8,"headline":"Memory corruption in APOGEE MBC (PPC) (BACnet)","id":"CVE-2021-31887","kev_date_added":null,"published":"2021-11-09"},{"cvss_score":8.8,"headline":"Memory corruption in APOGEE MBC (PPC) (BACnet)","id":"CVE-2021-31888","kev_date_added":null,"published":"2021-11-09"},{"cvss_score":8.7,"headline":"Denial of service in APOGEE MBC (PPC) (BACnet)","id":"CVE-2022-38371","kev_date_added":null,"published":"2022-10-11"},{"cvss_score":8.2,"headline":"Denial of service in Capital Embedded AR Classic 431-422","id":"CVE-2021-31346","kev_date_added":null,"published":"2021-11-09"}],"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":"2025-03-11","vendors":["Siemens"]},"summary":"Attackers can cause denial of service or information leaks in Siemens industrial controllers by sending malformed UDP packets with unchecked length fields.","url":"https://insights.sbomify.com/CVE-2021-31345/"}