{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-33541 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-33541 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-33541 is a high-severity denial of service vulnerability in Phoenix Contact ILC1x, published on 25 Jun 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-2021-33541 and fix it if it is affected.\n\nWhat it is: CVE-2021-33541 is a high-severity denial of service vulnerability in Phoenix Contact ILC1x, published on 25 Jun 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-2021-33541 in the wild and no public exploit code.\n\nAffected product: Phoenix Contact ILC1x. 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-2021-33541/ (Markdown: https://insights.sbomify.com/CVE-2021-33541/index.md)","id":"CVE-2021-33541","markdown":"https://insights.sbomify.com/CVE-2021-33541/index.md","name":"CVE-2021-33541","record":{"aliases":["GHSA-jwj9-vx74-vv26"],"analysis":{"component_type":"ics_ot","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Industrial controller","requires_auth":"none","summary":"Remote attackers can cause a denial of service on Phoenix Contact ILC1x controllers by sending crafted packets, requiring a device restart to restore network connectivity.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERTVDE","cpe":[{"product":"ilc1x0_firmware","vendor":"phoenixcontact"},{"product":"ilc1x1_firmware","vendor":"phoenixcontact"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 in all versions/variants are affected by a Denial-of-Service vulnerability. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module. A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected.","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":"Phoenix Contact: ILC1x Industrial controllers affected by Denial-of-Service vulnerability","id":"CVE-2021-33541","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":"Phoenix Contact: Automation Worx Software Suite affected by Remote Code Execution (RCE) vulnerability","id":"CVE-2021-33542"},"packages":[],"prev":{"headline":"Phoenix Contact: Undocumented FTP acces in certain AXL F BK and IL BK devices","id":"CVE-2021-33540"},"products":["ILC1x"],"published":"2021-06-25","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":["Phoenix Contact"]},"summary":"Remote attackers can cause a denial of service on Phoenix Contact ILC1x controllers by sending crafted packets, requiring a device restart to restore network connectivity.","url":"https://insights.sbomify.com/CVE-2021-33541/"}