{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2018-4851 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2018-4851 yet. Limit exposure of the affected software until one is available.","what":"CVE-2018-4851 is a high-severity denial of service vulnerability in Siemens AG SICLOCK TC100, SICLOCK TC400, published on 3 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-4851 and fix it if it is affected.\n\nWhat it is: CVE-2018-4851 is a high-severity denial of service vulnerability in Siemens AG SICLOCK TC100, SICLOCK TC400, published on 3 Jul 2018. 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-2018-4851 in the wild and no public exploit code.\n\nAffected product: Siemens AG SICLOCK TC100, SICLOCK TC400. 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-2018-4851/ (Markdown: https://insights.sbomify.com/CVE-2018-4851/index.md)","id":"CVE-2018-4851","markdown":"https://insights.sbomify.com/CVE-2018-4851/index.md","name":"CVE-2018-4851","record":{"aliases":["GHSA-x4qq-cpcc-jfwx"],"analysis":{"component_type":"ics_ot","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"SICLOCK time server","requires_auth":"none","summary":"An attacker can cause a denial-of-service condition on SICLOCK time servers by sending specific network packets, leading to device reboots.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"siclock_tc100_firmware","vendor":"siemens"},{"product":"siclock_tc400_firmware","vendor":"siemens"}],"cvss":{"score":8.2,"severity":"high","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.0"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"},{"id":"CWE-399","name":null}],"description":"A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with network access to the device could cause a Denial-of-Service condition by sending certain packets to the device, causing potential reboots of the device. The core functionality of the device could be impacted. The time serving functionality recovers when time synchronization with GPS devices or other NTP servers are completed.","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 SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4851","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2018"},"n_packages":0,"n_references":2,"next":{"headline":"Auth bypass in SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4852"},"packages":[],"prev":{"headline":"Denial of service in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below, SIMATIC S7-400 (incl. F) CPU hardware version 5.0, SIMATIC S7-400H CPU hardware version 4.5 and below","id":"CVE-2018-4850"},"products":["SICLOCK TC100, SICLOCK TC400"],"published":"2018-07-03","related":[{"cvss_score":9.8,"headline":"Auth bypass in SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4852","kev_date_added":null,"published":"2018-07-03"},{"cvss_score":9.8,"headline":"Missing authorization in SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4853","kev_date_added":null,"published":"2018-07-03"},{"cvss_score":8.8,"headline":"Missing authorization in SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4854","kev_date_added":null,"published":"2018-07-03"},{"cvss_score":6.5,"headline":"Information disclosure in SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4855","kev_date_added":null,"published":"2018-07-03"},{"cvss_score":4.9,"headline":"Auth bypass in SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4856","kev_date_added":null,"published":"2018-07-03"}],"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":["Siemens AG"]},"summary":"An attacker can cause a denial-of-service condition on SICLOCK time servers by sending specific network packets, leading to device reboots.","url":"https://insights.sbomify.com/CVE-2018-4851/"}