{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2018-12550 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2018-12550 is a high-severity authentication bypass vulnerability in The Eclipse Foundation Eclipse Mosquitto, published on 27 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-12550 and fix it if it is affected.\n\nWhat it is: CVE-2018-12550 is a high-severity authentication bypass vulnerability in The Eclipse Foundation Eclipse Mosquitto, published on 27 Mar 2019. 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-2018-12550 in the wild and no public exploit code.\n\nAffected product: The Eclipse Foundation Eclipse Mosquitto. 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-2018-12550/ (Markdown: https://insights.sbomify.com/CVE-2018-12550/index.md)","id":"CVE-2018-12550","markdown":"https://insights.sbomify.com/CVE-2018-12550/index.md","name":"CVE-2018-12550","record":{"aliases":["ALPINE-CVE-2018-12550","DEBIAN-CVE-2018-12550","GHSA-5cgw-j2m3-gxhw","UBUNTU-CVE-2018-12550"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"MQTT broker","requires_auth":"none","summary":"An empty ACL file in Eclipse Mosquitto incorrectly grants full access, allowing unauthorized users to bypass authentication and authorization controls.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"eclipse","cpe":[{"product":"mosquitto","vendor":"eclipse"}],"cvss":{"score":8.1,"severity":"high","source":"nvd","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-440","name":"Expected Behavior Violation"}],"description":"When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty, or contains only comments or blank lines, then Mosquitto will treat this as though no ACL file has been defined and use a default allow policy. The new behaviour is to have an empty ACL file mean that all access is denied, which is not a useful configuration but is not unexpected.","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":"Auth bypass in Eclipse Mosquitto","id":"CVE-2018-12550","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2018"},"n_packages":0,"n_references":2,"next":{"headline":"Auth bypass in Eclipse Mosquitto","id":"CVE-2018-12551"},"packages":[],"prev":{"headline":"Null dereference in Eclipse OpenJ9","id":"CVE-2018-12549"},"products":["Eclipse Mosquitto"],"published":"2019-03-27","related":[{"cvss_score":8.1,"headline":"Auth bypass in Eclipse Mosquitto","id":"CVE-2018-12551","kev_date_added":null,"published":"2019-03-27"},{"cvss_score":7.5,"headline":"Unconditionally adding an event to the epoll causes excessive CPU consumption","id":"CVE-2023-5632","kev_date_added":null,"published":"2023-10-18"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2023-28366","kev_date_added":null,"published":"2023-09-01"},{"cvss_score":7.5,"headline":"Denial of service in Eclipse Mosquitto","id":"CVE-2021-41039","kev_date_added":null,"published":"2021-12-01"},{"cvss_score":7.5,"headline":"Denial of service in Eclipse Mosquitto","id":"CVE-2021-34432","kev_date_added":null,"published":"2021-07-27"},{"cvss_score":7.5,"headline":"Missing authorization in n/a","id":"CVE-2018-20145","kev_date_added":null,"published":"2018-12-13"}],"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":["The Eclipse Foundation"]},"summary":"An empty ACL file in Eclipse Mosquitto incorrectly grants full access, allowing unauthorized users to bypass authentication and authorization controls.","url":"https://insights.sbomify.com/CVE-2018-12550/"}