{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-25673 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-25673 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-25673 is a medium-severity denial of service vulnerability in Siemens SIMATIC S7-PLCSIM V5.4, published on 15 Mar 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-2021-25673 and fix it if it is affected.\n\nWhat it is: CVE-2021-25673 is a medium-severity denial of service vulnerability in Siemens SIMATIC S7-PLCSIM V5.4, published on 15 Mar 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-2021-25673 in the wild and no public exploit code.\n\nAffected product: Siemens SIMATIC S7-PLCSIM V5.4. 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-2021-25673/ (Markdown: https://insights.sbomify.com/CVE-2021-25673/index.md)","id":"CVE-2021-25673","markdown":"https://insights.sbomify.com/CVE-2021-25673/index.md","name":"CVE-2021-25673","record":{"aliases":["GHSA-cxqw-29jq-pcjv"],"analysis":{"component_type":"desktop_application","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Siemens PLC simulator","requires_auth":"low_privilege","summary":"Local attackers can cause a denial of service in SIMATIC S7-PLCSIM by opening a specially crafted file, leading to an infinite loop.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"simatic_s7-plcsim","vendor":"siemens"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"}],"description":"A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with local access to the system could cause a Denial-of-Service condition in the application when it is used to open a specially crafted file. As a consequence, the application could enter an infinite loop, become unresponsive and must be restarted to restore the service.","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-PLCSIM V5.4","id":"CVE-2021-25673","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Null dereference in SIMATIC S7-PLCSIM V5.4","id":"CVE-2021-25674"},"packages":[],"prev":{"headline":"Missing authorization in Mendix Forgot Password Appstore module","id":"CVE-2021-25672"},"products":["SIMATIC S7-PLCSIM V5.4"],"published":"2021-03-15","related":[{"cvss_score":5.5,"headline":"Null dereference in SIMATIC S7-PLCSIM V5.4","id":"CVE-2021-25674","kev_date_added":null,"published":"2021-03-15"},{"cvss_score":5.5,"headline":"Denial of service in SIMATIC S7-PLCSIM V5.4","id":"CVE-2021-25675","kev_date_added":null,"published":"2021-03-15"}],"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":"Local attackers can cause a denial of service in SIMATIC S7-PLCSIM by opening a specially crafted file, leading to an infinite loop.","url":"https://insights.sbomify.com/CVE-2021-25673/"}