{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-40511 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-40511 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-40511 is a high-severity denial of service vulnerability in n/a, published on 21 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-40511 and fix it if it is affected.\n\nWhat it is: CVE-2021-40511 is a high-severity denial of service vulnerability in n/a, published on 21 Jun 2022. 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-2021-40511 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-2021-40511/ (Markdown: https://insights.sbomify.com/CVE-2021-40511/index.md)","id":"CVE-2021-40511","markdown":"https://insights.sbomify.com/CVE-2021-40511/index.md","name":"CVE-2021-40511","record":{"aliases":["GHSA-cv78-jp3v-7557"],"analysis":{"component_type":"other","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Mastro system","requires_auth":"none","summary":"An XML Entity Expansion vulnerability in OBDA Mastro allows attackers to cause a denial of service via billion laughs attack.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"mastro","vendor":"obdasystems"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","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-776","name":"Improper Restriction of Recursive Entity References in DTDs"}],"description":"OBDA systems’ Mastro 1.0 is vulnerable to XML Entity Expansion (aka “billion laughs”) attack allowing denial of service.","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":"Denial of service in n/a","id":"CVE-2021-40511","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":"Denial of service in n/a","id":"CVE-2021-40516"},"packages":[],"prev":{"headline":"XML eXternal Entity (XXE) in OBDA systems’ Mastro 1.0 allows remote attackers to read system files via custom DTDs.","id":"CVE-2021-40510"},"products":["n/a"],"published":"2022-06-21","related":[{"cvss_score":7.5,"headline":"XML eXternal Entity (XXE) in OBDA systems’ Mastro 1.0 allows remote attackers to read system files via custom DTDs.","id":"CVE-2021-40510","kev_date_added":null,"published":"2022-06-21"}],"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":"2024-08-04","vendors":["n/a"]},"summary":"An XML Entity Expansion vulnerability in OBDA Mastro allows attackers to cause a denial of service via billion laughs attack.","url":"https://insights.sbomify.com/CVE-2021-40511/"}