{"id":"UBUNTU-CVE-2024-45397","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.","modified":"2026-04-22T18:20:14.321003Z","published":"2024-10-11T15:15:00Z","upstream":["CVE-2024-45397"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-45397"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2024-45397"},{"type":"REPORT","url":"https://github.com/h2o/h2o/security/advisories/GHSA-jf2c-xjcp-wg4c"},{"type":"REPORT","url":"https://github.com/h2o/h2o/commit/15ed15a2efb83a77bb4baaa5a119e639c2f6898a"},{"type":"REPORT","url":"https://h2o.examp1e.net/configure/http3_directives.html"}],"affected":[{"package":{"name":"h2o","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/h2o@2.2.4+dfsg-1ubuntu0.1~esm2?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.3+dfsg-2","2.2.4+dfsg-1","2.2.4+dfsg-1build1","2.2.4+dfsg-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"h2o","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"},{"binary_name":"libh2o-dev-common","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"},{"binary_name":"libh2o-evloop0.13","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"},{"binary_name":"libh2o0.13","binary_version":"2.2.4+dfsg-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-45397.json"}},{"package":{"name":"h2o","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/h2o@2.2.5+dfsg2-3ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.5+dfsg2-3","2.2.5+dfsg2-3build1","2.2.5+dfsg2-3ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"h2o","binary_version":"2.2.5+dfsg2-3ubuntu0.1~esm1"},{"binary_name":"libh2o-dev-common","binary_version":"2.2.5+dfsg2-3ubuntu0.1~esm1"},{"binary_name":"libh2o-evloop0.13","binary_version":"2.2.5+dfsg2-3ubuntu0.1~esm1"},{"binary_name":"libh2o0.13","binary_version":"2.2.5+dfsg2-3ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-45397.json"}},{"package":{"name":"h2o","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/h2o@2.2.5+dfsg2-6.1ubuntu2+esm1?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.5+dfsg2-6","2.2.5+dfsg2-6.1","2.2.5+dfsg2-6.1ubuntu1","2.2.5+dfsg2-6.1ubuntu2","2.2.5+dfsg2-6.1ubuntu2+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"h2o","binary_version":"2.2.5+dfsg2-6.1ubuntu2+esm1"},{"binary_name":"libh2o-dev-common","binary_version":"2.2.5+dfsg2-6.1ubuntu2+esm1"},{"binary_name":"libh2o-evloop0.13","binary_version":"2.2.5+dfsg2-6.1ubuntu2+esm1"},{"binary_name":"libh2o0.13","binary_version":"2.2.5+dfsg2-6.1ubuntu2+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-45397.json"}},{"package":{"name":"h2o","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/h2o@2.2.5+dfsg2-8.1ubuntu3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.5+dfsg2-7","2.2.5+dfsg2-8","2.2.5+dfsg2-8.1ubuntu1","2.2.5+dfsg2-8.1ubuntu2","2.2.5+dfsg2-8.1ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_name":"h2o","binary_version":"2.2.5+dfsg2-8.1ubuntu3"},{"binary_name":"libh2o-dev-common","binary_version":"2.2.5+dfsg2-8.1ubuntu3"},{"binary_name":"libh2o-evloop0.13t64","binary_version":"2.2.5+dfsg2-8.1ubuntu3"},{"binary_name":"libh2o0.13t64","binary_version":"2.2.5+dfsg2-8.1ubuntu3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-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"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}