{"answers":{"affected":"It affects 10 products.","exploited":"There is no known exploitation of CVE-2021-31882 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-31882 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-31882 is a medium-severity denial of service vulnerability in Siemens Capital Embedded AR Classic 431-422, published on 9 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-31882 and fix it if it is affected.\n\nWhat it is: CVE-2021-31882 is a medium-severity denial of service vulnerability in Siemens Capital Embedded AR Classic 431-422, published on 9 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-31882 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-2021-31882/ (Markdown: https://insights.sbomify.com/CVE-2021-31882/index.md)","id":"CVE-2021-31882","markdown":"https://insights.sbomify.com/CVE-2021-31882/index.md","name":"CVE-2021-31882","record":{"aliases":["GHSA-w2w7-g4vg-h87m"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Siemens Capital Embedded AR","requires_auth":"none","summary":"A missing length validation in the DHCP client allows attackers to cause a denial-of-service condition by sending malformed DHCP ACK packets.","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":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"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). The DHCP client application does not validate the length of the Domain Name Server IP option(s) (0x06) when processing DHCP ACK packets. This may lead to Denial-of-Service conditions. (FSMD-2021-0011)","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 Capital Embedded AR Classic 431-422","id":"CVE-2021-31882","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":6,"next":{"headline":"Denial of service in Capital Embedded AR Classic 431-422","id":"CVE-2021-31883"},"packages":[],"prev":{"headline":"Denial of service in Capital Embedded AR Classic 431-422","id":"CVE-2021-31881"},"products":["Capital Embedded AR Classic 431-422","Capital Embedded AR Classic R20-11"],"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"},{"cvss_score":7.5,"headline":"Denial of service in Capital Embedded AR Classic 431-422","id":"CVE-2021-31345","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":"A missing length validation in the DHCP client allows attackers to cause a denial-of-service condition by sending malformed DHCP ACK packets.","url":"https://insights.sbomify.com/CVE-2021-31882/"}