{"id":"CVE-2024-45397","summary":"H2O alllows bypassing address-based access control with 0-RTT","details":"h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When an HTTP request using TLS/1.3 early data on top of TCP Fast Open or QUIC 0-RTT packets is received and the IP-address-based access control is used, the access control does not detect and prohibit HTTP requests conveyed by packets with a spoofed source address. This behavior allows attackers on the network to execute HTTP requests from addresses that are otherwise rejected by the address-based access control. The vulnerability has been addressed in commit 15ed15a. Users may disable the use of TCP FastOpen and QUIC to mitigate the issue.","aliases":["GHSA-jf2c-xjcp-wg4c"],"modified":"2026-04-16T04:13:47.026177Z","published":"2024-10-11T14:24:57.687Z","database_specific":{"cwe_ids":["CWE-284"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/45xxx/CVE-2024-45397.json"},"references":[{"type":"WEB","url":"https://h2o.examp1e.net/configure/http3_directives.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/45xxx/CVE-2024-45397.json"},{"type":"ADVISORY","url":"https://github.com/h2o/h2o/security/advisories/GHSA-jf2c-xjcp-wg4c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-45397"},{"type":"FIX","url":"https://github.com/h2o/h2o/commit/15ed15a2efb83a77bb4baaa5a119e639c2f6898a"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/h2o/h2o","events":[{"introduced":"0"},{"fixed":"15ed15a2efb83a77bb4baaa5a119e639c2f6898a"}]}],"versions":["v0.9.1","v0.9.2","v1.0.1","v1.1.0","v1.1.1","v1.2.0","v1.3.0","v1.3.0-beta1","v1.3.1","v1.4.0","v1.4.1","v1.4.2","v1.5.0","v1.5.0-beta1","v1.5.0-beta2","v1.5.0-beta3","v1.5.0-beta4","v1.5.1","v1.5.2","v1.5.3","v1.6.0","v1.6.0-beta1","v1.6.0-beta2","v1.7.0","v1.7.0-beta1","v1.7.0-beta2","v1.7.0-beta3","v1.7.0-beta4","v1.7.0-beta5"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"2024-10-10"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-45397.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}