{"answers":{"affected":"It affects 5 products.","exploited":"There is no known exploitation of CVE-2018-16556 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2018-16556 yet. Limit exposure of the affected software until one is available.","what":"CVE-2018-16556 is a high-severity denial of service vulnerability in Siemens SIMATIC S7-400 CPU 412-1 DP V7, published on 13 Dec 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-2018-16556 and fix it if it is affected.\n\nWhat it is: CVE-2018-16556 is a high-severity denial of service vulnerability in Siemens SIMATIC S7-400 CPU 412-1 DP V7, published on 13 Dec 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-2018-16556 in the wild and no public exploit code.\n\nAffected product: Siemens SIMATIC S7-400 CPU 412-1 DP V7. 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-2018-16556/ (Markdown: https://insights.sbomify.com/CVE-2018-16556/index.md)","id":"CVE-2018-16556","markdown":"https://insights.sbomify.com/CVE-2018-16556/index.md","name":"CVE-2018-16556","record":{"aliases":["GHSA-h69h-mwxm-xg4v"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Siemens SIMATIC PLC","requires_auth":"none","summary":"Remote attackers can cause denial of service on Siemens SIMATIC S7-400 CPUs by sending specially crafted packets, requiring manual reboot to restore operation.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"simatic_s7-400_firmware","vendor":"siemens"},{"product":"simatic_s7-400_pn\\/dp_v7_firmware","vendor":"siemens"},{"product":"simatic_s7-400h_firmware","vendor":"siemens"},{"product":"simatic_s7-400h_v6_firmware","vendor":"siemens"},{"product":"simatic_s7-410_firmware","vendor":"siemens"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"A vulnerability has been identified in  SIMATIC S7-400 CPU 412-1 DP V7 (All versions),  SIMATIC S7-400 CPU 412-2 DP V7 (All versions),  SIMATIC S7-400 CPU 414-2 DP V7 (All versions),  SIMATIC S7-400 CPU 414-3 DP V7 (All versions),  SIMATIC S7-400 CPU 414-3 PN/DP V7 (All versions \u003c V7.0.3),  SIMATIC S7-400 CPU 414F-3 PN/DP V7 (All versions \u003c V7.0.3),  SIMATIC S7-400 CPU 416-2 DP V7 (All versions),  SIMATIC S7-400 CPU 416-3 DP V7 (All versions),  SIMATIC S7-400 CPU 416-3 PN/DP V7 (All versions \u003c V7.0.3),  SIMATIC S7-400 CPU 416F-2 DP V7 (All versions),  SIMATIC S7-400 CPU 416F-3 PN/DP V7 (All versions \u003c V7.0.3),  SIMATIC S7-400 CPU 417-4 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 PN V7 (All versions \u003c V7.0.3), SIMATIC S7-400 H V4.5 and below CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants) (All versions \u003c V6.0.9), SIMATIC S7-400 PN/DP V6 and below CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-410 CPU family (incl. SIPLUS variants) (All versions \u003c V8.2.1), SIPLUS S7-400 CPU 414-3 PN/DP V7 (All versions \u003c V7.0.3), SIPLUS S7-400 CPU 416-3 PN/DP V7 (All versions \u003c V7.0.3), SIPLUS S7-400 CPU 416-3 V7 (All versions), SIPLUS S7-400 CPU 417-4 V7 (All versions). Specially crafted packets sent to port 102/tcp via Ethernet interface, via\r\nPROFIBUS, or via Multi Point Interfaces (MPI) could cause the affected\r\ndevices to go into defect mode. Manual reboot is required to resume normal\r\noperation.\r\n\r\nSuccessful exploitation requires an attacker to be able to send specially\r\ncrafted packets to port 102/tcp via Ethernet interface, via PROFIBUS or Multi\r\nPoint Interfaces (MPI). No user interaction and no user privileges are\r\nrequired to exploit the security vulnerability. The vulnerability could allow\r\ncausing a denial of service condition of the core functionality of the CPU,\r\ncompromising the availability of the system.","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 S7-400 CPU 412-1 DP V7","id":"CVE-2018-16556","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2018"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in SIMATIC S7-400 CPU 412-1 DP V7","id":"CVE-2018-16557"},"packages":[],"prev":{"headline":"Cross-site scripting in SCALANCE S602, SCALANCE S612, SCALANCE S623, SCALANCE S627-2M","id":"CVE-2018-16555"},"products":["SIMATIC S7-400 CPU 412-1 DP V7","SIMATIC S7-400 CPU 412-2 DP V7","SIMATIC S7-400 CPU 412-2 PN V7","SIMATIC S7-400 CPU 414-2 DP V7","SIMATIC S7-400 CPU 414-3 DP V7","SIMATIC S7-400 CPU 414-3 PN/DP V7","SIMATIC S7-400 CPU 414F-3 PN/DP V7","SIMATIC S7-400 CPU 416-2 DP V7","SIMATIC S7-400 CPU 416-3 DP V7","SIMATIC S7-400 CPU 416-3 PN/DP V7","SIMATIC S7-400 CPU 416F-2 DP V7","SIMATIC S7-400 CPU 416F-3 PN/DP V7","SIMATIC S7-400 CPU 417-4 DP V7","SIMATIC S7-400 H V4.5 and below CPU family (incl. SIPLUS variants)","SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants)","SIMATIC S7-400 PN/DP V6 and below CPU family (incl. SIPLUS variants)","SIMATIC S7-410 CPU family (incl. SIPLUS variants)","SIPLUS S7-400 CPU 414-3 PN/DP V7","SIPLUS S7-400 CPU 416-3 PN/DP V7","SIPLUS S7-400 CPU 416-3 V7","SIPLUS S7-400 CPU 417-4 V7"],"published":"2018-12-13","related":[{"cvss_score":8.2,"headline":"Denial of service in SIMATIC S7-400 CPU 412-1 DP V7","id":"CVE-2018-16557","kev_date_added":null,"published":"2018-12-13"},{"cvss_score":7.5,"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","kev_date_added":null,"published":"2018-05-16"}],"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":"2024-08-05","vendors":["Siemens"]},"summary":"Remote attackers can cause denial of service on Siemens SIMATIC S7-400 CPUs by sending specially crafted packets, requiring manual reboot to restore operation.","url":"https://insights.sbomify.com/CVE-2018-16556/"}