{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-40540 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-40540 is a critical vulnerability in n/a, published on 7 Sep 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-2021-40540 and fix it if it is affected.\n\nWhat it is: CVE-2021-40540 is a critical vulnerability in n/a, published on 7 Sep 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-2021-40540 in the wild and no public exploit code.\n\nAffected product: n/a. 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-2021-40540/ (Markdown: https://insights.sbomify.com/CVE-2021-40540/index.md)","id":"CVE-2021-40540","markdown":"https://insights.sbomify.com/CVE-2021-40540/index.md","name":"CVE-2021-40540","record":{"aliases":["DEBIAN-CVE-2021-40540","GHSA-jr28-h3mc-x46r","UBUNTU-CVE-2021-40540","openSUSE-SU-2024:11481-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Ulfius HTTP Framework","requires_auth":"none","summary":"A null pointer dereference in the Ulfius HTTP Framework allows attackers to cause a denial of service via malformed HTTP requests.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ulfius","vendor":"ulfius_project"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"ulfius_uri_logger in Ulfius HTTP Framework before 2.7.4 omits con_info initialization and a con_info-\u003erequest NULL check for certain malformed HTTP requests.","ecosystems":["openSUSE:Tumbleweed"],"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":"Null dereference in n/a","id":"CVE-2021-40540","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2021"},"n_packages":1,"n_references":3,"next":{"headline":"Cross-site scripting in n/a","id":"CVE-2021-40541"},"packages":[{"ecosystem":"openSUSE:Tumbleweed","fixed":["2.7.4-1.2"],"introduced":["0"],"last_affected":[],"package":"ulfius","purl":"pkg:rpm/opensuse/ulfius\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2024:11481-1"}],"prev":{"headline":"Zoho ManageEngine ADSelfService Plus Authentication Bypass","id":"CVE-2021-40539"},"products":["n/a"],"published":"2021-09-07","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"A null pointer dereference in the Ulfius HTTP Framework allows attackers to cause a denial of service via malformed HTTP requests.","url":"https://insights.sbomify.com/CVE-2021-40540/"}