{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2024-6640 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2024-6640 yet. Limit exposure of the affected software until one is available.","what":"CVE-2024-6640 is a medium-severity vulnerability in FreeBSD, published on 11 Aug 2024. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2024-6640 and fix it if it is affected.\n\nWhat it is: CVE-2024-6640 is a medium-severity vulnerability in FreeBSD, published on 11 Aug 2024. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2024-6640 in the wild and no public exploit code.\n\nAffected product: FreeBSD. 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-2024-6640/ (Markdown: https://insights.sbomify.com/CVE-2024-6640/index.md)","id":"CVE-2024-6640","markdown":"https://insights.sbomify.com/CVE-2024-6640/index.md","name":"CVE-2024-6640","record":{"aliases":["GHSA-57cg-pmv4-v925"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"FreeBSD firewall","requires_auth":"low_privilege","summary":"Attackers can bypass pf firewall rules to trigger ICMPv6 Echo Replies by exploiting state table matching flaws in Neighbor Discovery handling.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"freebsd","cpe":[],"cvss":{"score":6.3,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-276","name":"Incorrect Default Permissions"}],"description":"In ICMPv6 Neighbor Discovery (ND), the ID is always 0.  When pf is configured to allow ND and block incoming Echo Requests, a crafted Echo Request packet after a Neighbor Solicitation (NS) can trigger an Echo Reply.  The packet has to come from the same host as the NS and have a zero as identifier to match the state created by the Neighbor Discovery and allow replies to be generated.\n\nICMPv6 packets with identifier value of zero bypass firewall rules written on the assumption that the incoming packets are going to create a state in the state table.","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":"pf incorrectly matches different ICMPv6 states in the state table","id":"CVE-2024-6640","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2024"},"n_packages":0,"n_references":1,"next":{"headline":"WP Hardening – Fix Your WordPress Security \u003c= 1.2.6 - Unauthenticated Security Feature Bypass to Username Enumeration","id":"CVE-2024-6641"},"packages":[],"prev":{"headline":"MDx \u003c= 2.0.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via mdx_list_item Shortcode","id":"CVE-2024-6639"},"products":["FreeBSD"],"published":"2024-08-11","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-11-26","vendors":["FreeBSD"]},"summary":"Attackers can bypass pf firewall rules to trigger ICMPv6 Echo Replies by exploiting state table matching flaws in Neighbor Discovery handling.","url":"https://insights.sbomify.com/CVE-2024-6640/"}