{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2021-31894 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-31894 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-31894 is a high-severity missing authorization vulnerability in Siemens SIMATIC PCS 7 V8.2 and earlier, published on 13 Jul 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-2021-31894 and fix it if it is affected.\n\nWhat it is: CVE-2021-31894 is a high-severity missing authorization vulnerability in Siemens SIMATIC PCS 7 V8.2 and earlier, published on 13 Jul 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-2021-31894 in the wild and no public exploit code.\n\nAffected product: Siemens SIMATIC PCS 7 V8.2 and earlier. 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-2021-31894/ (Markdown: https://insights.sbomify.com/CVE-2021-31894/index.md)","id":"CVE-2021-31894","markdown":"https://insights.sbomify.com/CVE-2021-31894/index.md","name":"CVE-2021-31894","record":{"aliases":["GHSA-rq6h-r956-9p9r"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["data_modify","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Siemens industrial automation","requires_auth":"low_privilege","summary":"Attackers can modify device configuration metafiles due to insecure write permissions, potentially altering device behavior in Siemens industrial software.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"simatic_pcs_7_firmware","vendor":"siemens"},{"product":"simatic_pdm_firmware","vendor":"siemens"},{"product":"simatic_step_7_firmware","vendor":"siemens"},{"product":"sinamics_starter_firmware","vendor":"siemens"}],"cvss":{"score":8.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-732","name":"Incorrect Permission Assignment for Critical Resource"}],"description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.X (All versions \u003c V9.1 SP2), SIMATIC PDM (All versions \u003c V9.2 SP2), SIMATIC STEP 7 V5.X (All versions \u003c V5.7), SINAMICS STARTER (containing STEP 7 OEM version) (All versions \u003c V5.4 SP2 HF1). A directory containing metafiles relevant to devices' configurations has write permissions. An attacker could leverage this vulnerability by changing the content of certain metafiles and subsequently manipulate parameters or behavior of devices that would be later configured by the affected software.","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":"Missing authorization in SIMATIC PCS 7 V8.2 and earlier","id":"CVE-2021-31894","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Memory corruption in RUGGEDCOM M2100","id":"CVE-2021-31895"},"packages":[],"prev":{"headline":"Memory corruption in SIMATIC PCS 7 V8.2 and earlier","id":"CVE-2021-31893"},"products":["SIMATIC PCS 7 V8.2 and earlier","SIMATIC PCS 7 V9.X","SIMATIC PDM","SIMATIC STEP 7 V5.X","SINAMICS STARTER (containing STEP 7 OEM version)"],"published":"2021-07-13","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":"2024-08-03","vendors":["Siemens"]},"summary":"Attackers can modify device configuration metafiles due to insecure write permissions, potentially altering device behavior in Siemens industrial software.","url":"https://insights.sbomify.com/CVE-2021-31894/"}