{"answers":{"affected":"It affects 25 products.","exploited":"There is no known exploitation of CVE-2021-31340 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-31340 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-31340 is a high-severity denial of service vulnerability in Siemens SIMATIC RF166C, published on 8 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-2021-31340 and fix it if it is affected.\n\nWhat it is: CVE-2021-31340 is a high-severity denial of service vulnerability in Siemens SIMATIC RF166C, published on 8 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-2021-31340 in the wild and no public exploit code.\n\nAffected product: Siemens SIMATIC RF166C. 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-2021-31340/ (Markdown: https://insights.sbomify.com/CVE-2021-31340/index.md)","id":"CVE-2021-31340","markdown":"https://insights.sbomify.com/CVE-2021-31340/index.md","name":"CVE-2021-31340","record":{"aliases":["GHSA-hjxf-6qxm-x8qg"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Siemens SIMATIC RFID reader","requires_auth":"none","summary":"An attacker can cause a Denial-of-Service condition on Siemens SIMATIC RFID readers by sending a large number of incoming connections.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"simatic_reader_rf610r_cmiit_firmware","vendor":"siemens"},{"product":"simatic_reader_rf610r_etsi_firmware","vendor":"siemens"},{"product":"simatic_reader_rf610r_fcc_firmware","vendor":"siemens"},{"product":"simatic_reader_rf615r_cmiit_firmware","vendor":"siemens"},{"product":"simatic_reader_rf615r_etsi_firmware","vendor":"siemens"},{"product":"simatic_reader_rf615r_fcc_firmware","vendor":"siemens"},{"product":"simatic_reader_rf650r_arib_firmware","vendor":"siemens"},{"product":"simatic_reader_rf650r_cmiit_firmware","vendor":"siemens"},{"product":"simatic_reader_rf650r_etsi_firmware","vendor":"siemens"},{"product":"simatic_reader_rf650r_fcc_firmware","vendor":"siemens"},{"product":"simatic_reader_rf680r_arib_firmware","vendor":"siemens"},{"product":"simatic_reader_rf680r_cmiit_firmware","vendor":"siemens"},{"product":"simatic_reader_rf680r_etsi_firmware","vendor":"siemens"},{"product":"simatic_reader_rf680r_fcc_firmware","vendor":"siemens"},{"product":"simatic_reader_rf685r_arib_firmware","vendor":"siemens"},{"product":"simatic_reader_rf685r_cmiit_firmware","vendor":"siemens"},{"product":"simatic_reader_rf685r_etsi_firmware","vendor":"siemens"},{"product":"simatic_reader_rf685r_fcc_firmware","vendor":"siemens"},{"product":"simatic_rf166c_firmware","vendor":"siemens"},{"product":"simatic_rf185c_firmware","vendor":"siemens"},{"product":"simatic_rf186c_firmware","vendor":"siemens"},{"product":"simatic_rf186ci_firmware","vendor":"siemens"},{"product":"simatic_rf188c_firmware","vendor":"siemens"},{"product":"simatic_rf188ci_firmware","vendor":"siemens"},{"product":"simatic_rf360r_firmware","vendor":"siemens"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","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-400","name":"Uncontrolled Resource Consumption"}],"description":"A vulnerability has been identified in SIMATIC RF166C (All versions \u003e V1.1 and \u003c V1.3.2), SIMATIC RF185C (All versions \u003e V1.1 and \u003c V1.3.2), SIMATIC RF186C (All versions \u003e V1.1 and \u003c V1.3.2), SIMATIC RF186CI (All versions \u003e V1.1 and \u003c V1.3.2), SIMATIC RF188C (All versions \u003e V1.1 and \u003c V1.3.2), SIMATIC RF188CI (All versions \u003e V1.1 and \u003c V1.3.2), SIMATIC RF360R (All versions \u003c V2.0), SIMATIC Reader RF610R CMIIT (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF610R ETSI (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF610R FCC (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF615R CMIIT (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF615R ETSI (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF615R FCC (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF650R ARIB (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF650R CMIIT (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF650R ETSI (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF650R FCC (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF680R ARIB (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF680R CMIIT (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF680R ETSI (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF680R FCC (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF685R ARIB (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF685R CMIIT (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF685R ETSI (All versions \u003e V3.0 \u003c V4.0), SIMATIC Reader RF685R FCC (All versions \u003e V3.0 \u003c V4.0). Affected devices do not properly handle large numbers of incoming connections. An attacker may leverage this to cause a Denial-of-Service situation.","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 SIMATIC RF166C","id":"CVE-2021-31340","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":"Information disclosure in Mendix Database Replication Module","id":"CVE-2021-31341"},"packages":[],"prev":{"headline":"Information disclosure in Mendix Excel Importer Module","id":"CVE-2021-31339"},"products":["SIMATIC RF166C","SIMATIC RF185C","SIMATIC RF186C","SIMATIC RF186CI","SIMATIC RF188C","SIMATIC RF188CI","SIMATIC RF360R","SIMATIC Reader RF610R CMIIT","SIMATIC Reader RF610R ETSI","SIMATIC Reader RF610R FCC","SIMATIC Reader RF615R CMIIT","SIMATIC Reader RF615R ETSI","SIMATIC Reader RF615R FCC","SIMATIC Reader RF650R ARIB","SIMATIC Reader RF650R CMIIT","SIMATIC Reader RF650R ETSI","SIMATIC Reader RF650R FCC","SIMATIC Reader RF680R ARIB","SIMATIC Reader RF680R CMIIT","SIMATIC Reader RF680R ETSI","SIMATIC Reader RF680R FCC","SIMATIC Reader RF685R ARIB","SIMATIC Reader RF685R CMIIT","SIMATIC Reader RF685R ETSI","SIMATIC Reader RF685R FCC"],"published":"2021-06-08","related":[{"cvss_score":7,"headline":"Misconfiguration in SIMATIC RF1140R","id":"CVE-2024-37990","kev_date_added":null,"published":"2024-09-10"},{"cvss_score":6.9,"headline":"Missing authorization in SIMATIC RF1140R","id":"CVE-2024-37993","kev_date_added":null,"published":"2024-09-10"},{"cvss_score":6,"headline":"Missing authorization in SIMATIC RF1140R","id":"CVE-2024-37991","kev_date_added":null,"published":"2024-09-10"},{"cvss_score":5.9,"headline":"Denial of service in SIMATIC RF1140R","id":"CVE-2024-37992","kev_date_added":null,"published":"2024-09-10"},{"cvss_score":5.3,"headline":"Information disclosure in SIMATIC RF1140R","id":"CVE-2024-37994","kev_date_added":null,"published":"2024-09-10"},{"cvss_score":2.1,"headline":"Denial of service in SIMATIC RF1140R","id":"CVE-2024-37995","kev_date_added":null,"published":"2024-09-10"}],"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":["Siemens"]},"summary":"An attacker can cause a Denial-of-Service condition on Siemens SIMATIC RFID readers by sending a large number of incoming connections.","url":"https://insights.sbomify.com/CVE-2021-31340/"}