{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2018-6343 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2018-6343 yet. Limit exposure of the affected software until one is available.","what":"CVE-2018-6343 is a high-severity vulnerability in Facebook Proxygen, published on 31 Dec 2018."},"fix_prompt":"Check this codebase for CVE-2018-6343 and fix it if it is affected.\n\nWhat it is: CVE-2018-6343 is a high-severity vulnerability in Facebook Proxygen, published on 31 Dec 2018. \nExploitation: There is no known exploitation of CVE-2018-6343 in the wild and no public exploit code.\n\nAffected product: Facebook Proxygen. 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-2018-6343/ (Markdown: https://insights.sbomify.com/CVE-2018-6343/index.md)","id":"CVE-2018-6343","markdown":"https://insights.sbomify.com/CVE-2018-6343/index.md","name":"CVE-2018-6343","record":{"aliases":["GHSA-php7-7869-j4qf"],"analysis":null,"analysis_generated_by":null,"assigner":"facebook","cpe":[{"product":"proxygen","vendor":"facebook"}],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","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-20","name":"Improper Input Validation"},{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"Proxygen fails to validate that a secondary auth manager is set before dereferencing it. That can cause a denial of service issue when parsing a Certificate/CertificateRequest HTTP2 Frame over a fizz (TLS 1.3) transport. This issue affects Proxygen releases starting from v2018.10.29.00 until the fix in v2018.11.19.00.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Proxygen fails to validate that a secondary auth manager is set before dereferencing it.","id":"CVE-2018-6343","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2018"},"n_packages":0,"n_references":1,"next":{"headline":"Memory corruption in WhatsApp for Android","id":"CVE-2018-6344"},"packages":[],"prev":{"headline":"react-dev-utils on Windows vulnerable to Remote Code Execution","id":"CVE-2018-6342"},"products":["Proxygen"],"published":"2018-12-31","related":[{"cvss_score":9.8,"headline":"Use after free in proxygen","id":"CVE-2020-1897","kev_date_added":null,"published":"2020-05-18"},{"cvss_score":9.8,"headline":"Use after free in Proxygen","id":"CVE-2019-11940","kev_date_added":null,"published":"2019-12-04"},{"cvss_score":9.8,"headline":"Memory corruption in Proxygen","id":"CVE-2019-11921","kev_date_added":null,"published":"2019-07-25"},{"cvss_score":5.3,"headline":"Denial of service in proxygen","id":"CVE-2025-55181","kev_date_added":null,"published":"2025-12-02"}],"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-05-06","vendors":["Facebook"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2018-6343/"}