{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2018-4856 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2018-4856 yet. Limit exposure of the affected software until one is available.","what":"CVE-2018-4856 is a medium-severity authentication bypass vulnerability in Siemens AG SICLOCK TC100, SICLOCK TC400, published on 3 Jul 2018. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-4856 and fix it if it is affected.\n\nWhat it is: CVE-2018-4856 is a medium-severity authentication bypass vulnerability in Siemens AG SICLOCK TC100, SICLOCK TC400, published on 3 Jul 2018. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2018-4856 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-2018-4856/ (Markdown: https://insights.sbomify.com/CVE-2018-4856/index.md)","id":"CVE-2018-4856","markdown":"https://insights.sbomify.com/CVE-2018-4856/index.md","name":"CVE-2018-4856","record":{"aliases":["GHSA-vjcj-jj92-97vr"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"SICLOCK time server","requires_auth":"high_privilege","summary":"An attacker with administrative access can lock out legitimate users from the SICLOCK management interface, requiring manual intervention to restore access.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"siclock_tc100_firmware","vendor":"siemens"},{"product":"siclock_tc400_firmware","vendor":"siemens"}],"cvss":{"score":4.9,"severity":"medium","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","version":"3.0"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with administrative access to the device's management interface could lock out legitimate users. Manual interaction is required to restore the access of legitimate users.","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":"Auth bypass in SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4856","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2018"},"n_packages":0,"n_references":2,"next":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2018-4857"},"packages":[],"prev":{"headline":"Information disclosure in SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4855"},"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":8.2,"headline":"Denial of service in SICLOCK TC100, SICLOCK TC400","id":"CVE-2018-4851","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"}],"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 with administrative access can lock out legitimate users from the SICLOCK management interface, requiring manual intervention to restore access.","url":"https://insights.sbomify.com/CVE-2018-4856/"}