{"answers":{"affected":"It affects 6 products.","exploited":"There is no known exploitation of CVE-2021-37186 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-37186 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-37186 is a medium-severity vulnerability in Siemens LOGO! CMR2020, published on 14 Sep 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-2021-37186 and fix it if it is affected.\n\nWhat it is: CVE-2021-37186 is a medium-severity vulnerability in Siemens LOGO! CMR2020, published on 14 Sep 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-2021-37186 in the wild and no public exploit code.\n\nAffected product: Siemens LOGO! CMR2020. 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-2021-37186/ (Markdown: https://insights.sbomify.com/CVE-2021-37186/index.md)","id":"CVE-2021-37186","markdown":"https://insights.sbomify.com/CVE-2021-37186/index.md","name":"CVE-2021-37186","record":{"aliases":["GHSA-5g5j-x767-23r3"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Siemens industrial router","requires_auth":"none","summary":"Weak random number generation in TCP/IP stack allows adjacent attackers to spoof connections and access sensitive information on Siemens industrial devices.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"logo\\!_cmr2020_firmware","vendor":"siemens"},{"product":"logo\\!_cmr2040_firmware","vendor":"siemens"},{"product":"simatic_rtu3010c_firmware","vendor":"siemens"},{"product":"simatic_rtu3030c_firmware","vendor":"siemens"},{"product":"simatic_rtu3031c_firmware","vendor":"siemens"},{"product":"simatic_rtu3041c_firmware","vendor":"siemens"}],"cvss":{"score":5.4,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-330","name":"Use of Insufficiently Random Values"}],"description":"A vulnerability has been identified in LOGO! CMR2020 (All versions \u003c V2.2), LOGO! CMR2040 (All versions \u003c V2.2), SIMATIC RTU3010C (All versions \u003c V4.0.9), SIMATIC RTU3030C (All versions \u003c V4.0.9), SIMATIC RTU3031C (All versions \u003c V4.0.9), SIMATIC RTU3041C (All versions \u003c V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information.","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":"Weak cryptography in LOGO! CMR2020","id":"CVE-2021-37186","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Information disclosure in n/a","id":"CVE-2021-37187"},"packages":[],"prev":{"headline":"Denial of service in SIMATIC Drive Controller family","id":"CVE-2021-37185"},"products":["LOGO! CMR2020","LOGO! CMR2040","SIMATIC RTU3010C","SIMATIC RTU3030C","SIMATIC RTU3031C","SIMATIC RTU3041C"],"published":"2021-09-14","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":"2024-08-04","vendors":["Siemens"]},"summary":"Weak random number generation in TCP/IP stack allows adjacent attackers to spoof connections and access sensitive information on Siemens industrial devices.","url":"https://insights.sbomify.com/CVE-2021-37186/"}