{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2018-21035 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2018-21035 is a high-severity denial of service vulnerability in Qt Qt, published on 28 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-21035 and fix it if it is affected.\n\nWhat it is: CVE-2018-21035 is a high-severity denial of service vulnerability in Qt Qt, published on 28 Feb 2020. 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-2018-21035 in the wild and no public exploit code.\n\nAffected product: Qt Qt. 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-2018-21035/ (Markdown: https://insights.sbomify.com/CVE-2018-21035/index.md)","id":"CVE-2018-21035","markdown":"https://insights.sbomify.com/CVE-2018-21035/index.md","name":"CVE-2018-21035","record":{"aliases":["AZL-6833","DEBIAN-CVE-2018-21035","GHSA-xhq4-5269-2ffv","MGASA-2021-0270","UBUNTU-CVE-2018-21035"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Qt WebSocket library","requires_auth":"none","summary":"Attackers can cause denial of service via memory consumption by sending large WebSocket frames, as Qt lacks configurable size limits.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"qt","vendor":"qt"}],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:3.0/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:C/UI:N","version":"3.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"In Qt through 5.14.1, the WebSocket implementation accepts up to 2GB for frames and 2GB for messages. Smaller limits cannot be configured. This makes it easier for attackers to cause a denial of service (memory consumption).","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Denial of service in n/a","id":"CVE-2018-21035","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"qt:qt","products":["qt:qt"],"type":"denial_of_service","year":"2018"},"n_packages":0,"n_references":2,"next":{"headline":"Improper Input Validation in sails-hook-sockets","id":"CVE-2018-21036"},"packages":[],"prev":{"headline":"Argo Exposure of Sensitive Information","id":"CVE-2018-21034"},"products":["n/a"],"published":"2020-02-28","related":[{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2020-12267","kev_date_added":null,"published":"2020-04-27"},{"cvss_score":9.8,"headline":"Command injection in Qt for Android","id":"CVE-2017-10904","kev_date_added":null,"published":"2017-12-15"},{"cvss_score":9.3,"headline":"Memory corruption in n/a","id":"CVE-2011-3194","kev_date_added":null,"published":"2012-06-16"},{"cvss_score":8.8,"headline":"Integer overflow in Qt","id":"CVE-2022-40983","kev_date_added":null,"published":"2023-01-12"},{"cvss_score":8.8,"headline":"Memory corruption in Qt","id":"CVE-2022-43591","kev_date_added":null,"published":"2023-01-12"},{"cvss_score":8.6,"headline":"Race condition in n/a","id":"CVE-2024-39936","kev_date_added":null,"published":"2024-07-04"}],"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":"2024-08-05","vendors":["n/a"]},"summary":"Attackers can cause denial of service via memory consumption by sending large WebSocket frames, as Qt lacks configurable size limits.","url":"https://insights.sbomify.com/CVE-2018-21035/"}