{"answers":{"affected":"It affects 9 products.","exploited":"There is no known exploitation of CVE-2021-20988 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20988 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20988 is a high-severity denial of service vulnerability in Hilscher Ethernet IO Modules ICE1-16, 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-2021-20988 and fix it if it is affected.\n\nWhat it is: CVE-2021-20988 is a high-severity denial of service vulnerability in Hilscher Ethernet IO Modules ICE1-16, 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-2021-20988 in the wild and no public exploit code.\n\nAffected product: Hilscher Ethernet IO Modules ICE1-16. 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-2021-20988/ (Markdown: https://insights.sbomify.com/CVE-2021-20988/index.md)","id":"CVE-2021-20988","markdown":"https://insights.sbomify.com/CVE-2021-20988/index.md","name":"CVE-2021-20988","record":{"aliases":["GHSA-473m-ppf7-95wq"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Industrial Ethernet IO","requires_auth":"none","summary":"Attackers can cause denial of service on Hilscher rcX RTOS devices by sending malformed UDP packets with incorrect length fields.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERTVDE","cpe":[{"product":"rcx_rtos","vendor":"hilscher"},{"product":"ice1-16di-g60l-v1d_firmware","vendor":"pepperl-fuchs"},{"product":"ice1-16dio-g60l-c1-v1d_firmware","vendor":"pepperl-fuchs"},{"product":"ice1-16dio-g60l-v1d_firmware","vendor":"pepperl-fuchs"},{"product":"ice1-8di8do-g60l-c1-v1d_firmware","vendor":"pepperl-fuchs"},{"product":"ice1-8di8do-g60l-v1d_firmware","vendor":"pepperl-fuchs"},{"product":"ice1-8iol-g30l-v1d_firmware","vendor":"pepperl-fuchs"},{"product":"ice1-8iol-g60l-v1d_firmware","vendor":"pepperl-fuchs"},{"product":"ice1-8iol-s2-g60l-v1d_firmware","vendor":"pepperl-fuchs"}],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.","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":"Hilscher rcX RTOS: Wrong handling of the UDP checksum","id":"CVE-2021-20988","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Fibaro Home Center Insufficient remote access server authorization","id":"CVE-2021-20989"},"packages":[],"prev":{"headline":"Hilscher: EtherNet/IP stack crash for specific CIP service","id":"CVE-2021-20987"},"products":["Ethernet IO Modules ICE1-16","Ethernet IO Modules ICE1-8","rcX RTOS"],"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":["Hilscher","Pepperl+Fuchs"]},"summary":"Attackers can cause denial of service on Hilscher rcX RTOS devices by sending malformed UDP packets with incorrect length fields.","url":"https://insights.sbomify.com/CVE-2021-20988/"}