{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2023-30756 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-30756 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-30756 is a high-severity vulnerability in Siemens SIMATIC CP 1242-7 V2 (incl. SIPLUS variants), published on 10 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-30756 and fix it if it is affected.\n\nWhat it is: CVE-2023-30756 is a high-severity vulnerability in Siemens SIMATIC CP 1242-7 V2 (incl. SIPLUS variants), published on 10 Sep 2024. 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-2023-30756 in the wild and no public exploit code.\n\nAffected product: Siemens SIMATIC CP 1242-7 V2 (incl. SIPLUS variants). 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-2023-30756/ (Markdown: https://insights.sbomify.com/CVE-2023-30756/index.md)","id":"CVE-2023-30756","markdown":"https://insights.sbomify.com/CVE-2023-30756/index.md","name":"CVE-2023-30756","record":{"aliases":["GHSA-4p43-gfmp-qjmm"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Siemens SIMATIC devices","requires_auth":"none","summary":"Remote attackers can cause denial of service in Siemens SIMATIC devices via a NULL dereference in the web server's Expect header handling.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"A vulnerability has been identified in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) (All versions \u003c V3.5.20), SIMATIC CP 1243-1 (incl. SIPLUS variants) (All versions \u003c V3.5.20), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions \u003c V3.5.20), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions \u003c V3.5.20), SIMATIC CP 1243-7 LTE (All versions \u003c V3.5.20), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions \u003c V3.5.20), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions), SIMATIC IPC DiagBase (All versions), SIMATIC IPC DiagMonitor (All versions), SIMATIC WinCC Runtime Advanced (All versions), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions \u003c V2.4.8), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions \u003c V2.4.8). The web server of the affected devices do not properly handle certain errors when using the Expect HTTP request header, resulting in NULL dereference.\r\n\r\nThis could allow a remote attacker with no privileges to cause a denial of service condition in 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":"Null dereference in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants)","id":"CVE-2023-30756","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2023"},"n_packages":0,"n_references":1,"next":{"headline":"A vulnerability has been identified in Totally Integrated Automation Portal (TIA Portal) V14 (All versions), Totally Integrated Automation P","id":"CVE-2023-30757"},"packages":[],"prev":{"headline":"Null dereference in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants)","id":"CVE-2023-30755"},"products":["SIMATIC CP 1242-7 V2 (incl. SIPLUS variants)","SIMATIC CP 1243-1 (incl. SIPLUS variants)","SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants)","SIMATIC CP 1243-1 IEC (incl. SIPLUS variants)","SIMATIC CP 1243-7 LTE","SIMATIC CP 1243-8 IRC","SIMATIC HMI Comfort Panels (incl. SIPLUS variants)","SIMATIC IPC DiagBase","SIMATIC IPC DiagMonitor","SIMATIC WinCC Runtime Advanced","SIPLUS TIM 1531 IRC","TIM 1531 IRC"],"published":"2024-09-10","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-09-10","vendors":["Siemens"]},"summary":"Remote attackers can cause denial of service in Siemens SIMATIC devices via a NULL dereference in the web server's Expect header handling.","url":"https://insights.sbomify.com/CVE-2023-30756/"}