{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2021-31893 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-31893 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-31893 is a high-severity memory corruption 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-2021-31893 and fix it if it is affected.\n\nWhat it is: CVE-2021-31893 is a high-severity memory corruption 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-2021-31893 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-2021-31893/ (Markdown: https://insights.sbomify.com/CVE-2021-31893/index.md)","id":"CVE-2021-31893","markdown":"https://insights.sbomify.com/CVE-2021-31893/index.md","name":"CVE-2021-31893","record":{"aliases":["GHSA-47m5-c425-v4ww"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Siemens industrial software","requires_auth":"low_privilege","summary":"A buffer overflow in Siemens industrial software allows local attackers to cause denial of service or potentially execute remote code.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"simatic_pcs_firmware","vendor":"siemens"},{"product":"simatic_pdm_firmware","vendor":"siemens"},{"product":"simatic_step_7_firmware","vendor":"siemens"},{"product":"sinamics_starter_firmware","vendor":"siemens"}],"cvss":{"score":7.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3), SIMATIC PDM (All versions \u003c V9.2), SIMATIC STEP 7 V5.X (All versions \u003c V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions \u003c V5.4 HF2). The affected software contains a buffer overflow vulnerability while handling certain files that could allow a local attacker to trigger a denial-of-service condition or potentially lead to remote code execution.","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":"Memory corruption in SIMATIC PCS 7 V8.2 and earlier","id":"CVE-2021-31893","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Missing authorization in SIMATIC PCS 7 V8.2 and earlier","id":"CVE-2021-31894"},"packages":[],"prev":{"headline":"Weak cryptography in SINUMERIK Analyse MyCondition","id":"CVE-2021-31892"},"products":["SIMATIC PCS 7 V8.2 and earlier","SIMATIC PCS 7 V9.0","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":"A buffer overflow in Siemens industrial software allows local attackers to cause denial of service or potentially execute remote code.","url":"https://insights.sbomify.com/CVE-2021-31893/"}