{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2020-12526 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-12526 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-12526 is a medium-severity denial of service vulnerability in Beckhoff IPC Diagnostics UA Server, published on 13 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-12526 and fix it if it is affected.\n\nWhat it is: CVE-2020-12526 is a medium-severity denial of service vulnerability in Beckhoff IPC Diagnostics UA Server, published on 13 May 2021. 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-2020-12526 in the wild and no public exploit code.\n\nAffected product: Beckhoff IPC Diagnostics UA Server. 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-2020-12526/ (Markdown: https://insights.sbomify.com/CVE-2020-12526/index.md)","id":"CVE-2020-12526","markdown":"https://insights.sbomify.com/CVE-2020-12526/index.md","name":"CVE-2020-12526","record":{"aliases":["GHSA-53xf-f462-gx5v"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Beckhoff OPC UA Server","requires_auth":"none","summary":"Attackers can cause denial of service in Beckhoff TwinCAT and IPC Diagnostics OPC UA servers by sending crafted requests, rendering the server unresponsive.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERTVDE","cpe":[{"product":"ipc_diagnostics_ua_server","vendor":"beckhoff"},{"product":"tf6100","vendor":"beckhoff"},{"product":"twincat_opc_ua_server","vendor":"beckhoff"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"TwinCAT OPC UA Server in versions up to 2.3.0.12 and IPC Diagnostics UA Server in versions up to 3.1.0.1 from Beckhoff Automation GmbH \u0026 Co. KG are vulnerable to denial of service attacks. The attacker needs to send several specifically crafted requests to the running OPC UA server. After some of these requests the OPC UA server is no longer responsive to any client. This is without effect to the real-time functionality of IPCs.","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":"BECKHOFF: DoS-Vulnerability for TwinCAT OPC UA Server and IPC Diagnostics UA Server","id":"CVE-2020-12526","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":0,"n_references":2,"next":{"headline":"Improper Access Validation in products of MB connect line and Helmholz","id":"CVE-2020-12527"},"packages":[],"prev":{"headline":"WAGO/M\u0026M Software Deserialization of untrusted data in fdtCONTAINER component","id":"CVE-2020-12525"},"products":["IPC Diagnostics UA Server","TF6100","TwinCAT OPC UA Server"],"published":"2021-05-13","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":"2024-09-16","vendors":["Beckhoff"]},"summary":"Attackers can cause denial of service in Beckhoff TwinCAT and IPC Diagnostics OPC UA servers by sending crafted requests, rendering the server unresponsive.","url":"https://insights.sbomify.com/CVE-2020-12526/"}