{"id":"CVE-2023-49295","aliases":["GHSA-ppxx-5m9h-6vxf","GO-2024-2459"],"url":"https://o3.security/vulnerability/CVE-2023-49295","summary":"quic-go's path validation mechanism can cause denial of service","details":"An attacker can cause its peer to run out of memory sending a large number of PATH_CHALLENGE frames. The receiver is supposed to respond to each PATH_CHALLENGE frame with a PATH_RESPONSE frame. The attacker can prevent the receiver from sending out (the vast majority of) these PATH_RESPONSE frames by collapsing the peers congestion window (by selectively acknowledging received packets) and by manipulating the peer's RTT estimate.\n\nI published a more detailed description of the attack and its mitigation in this blog post: https://seemann.io/posts/2023-12-18-exploiting-quics-path-validation/\n\nThere's no way to mitigate this attack, please update quic-go to a version that contains the fix.","published":"2024-01-10T21:40:58.881Z","modified":"2026-08-12T03:51:44.574602244Z","cvss":{"score":6.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/quic-go/quic-go","fixedVersion":"0.40.1"},{"ecosystem":"Go","name":"github.com/quic-go/quic-go","fixedVersion":"0.39.4"},{"ecosystem":"Go","name":"github.com/quic-go/quic-go","fixedVersion":"0.38.2"},{"ecosystem":"Go","name":"github.com/quic-go/quic-go","fixedVersion":"0.37.7"}],"fix":{"url":"https://github.com/quic-go/quic-go/commit/17fc98c2d81dbe685c19702dc694a9d606ac56dc","label":"quic-go/quic-go@17fc98c"},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G5RSHDTVMYAIGYVVFGKTMFHAZJMA3EVV/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZE7IOKXX5AATU2WR3V76X5Y3A44QAATG/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49295.json"},{"type":"ADVISORY","url":"https://github.com/quic-go/quic-go/security/advisories/GHSA-ppxx-5m9h-6vxf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-49295"},{"type":"FIX","url":"https://github.com/quic-go/quic-go/commit/17fc98c2d81dbe685c19702dc694a9d606ac56dc"},{"type":"FIX","url":"https://github.com/quic-go/quic-go/commit/21609ddfeff93668c7625a85eb09f1541fdad965"},{"type":"FIX","url":"https://github.com/quic-go/quic-go/commit/3a9c18bcd27a01c551ac9bf8bd2b4bded77c189a"},{"type":"FIX","url":"https://github.com/quic-go/quic-go/commit/554d543b50b917369fb1394cc5396d928166cf49"},{"type":"FIX","url":"https://github.com/quic-go/quic-go/commit/6cc3d58935426191296171a6c0d1ee965e10534e"},{"type":"FIX","url":"https://github.com/quic-go/quic-go/commit/9aaefe19fc3dc8c8917cc87e6128bb56d9e9e6cc"},{"type":"FIX","url":"https://github.com/quic-go/quic-go/commit/a0ffa757499913f7be69aa78f573a6aee3430ae4"},{"type":"FIX","url":"https://github.com/quic-go/quic-go/commit/d7aa627ebde91cf799ada2a07443faa9b1e5abb8"},{"type":"PACKAGE","url":"https://github.com/quic-go/quic-go"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G5RSHDTVMYAIGYVVFGKTMFHAZJMA3EVV"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZE7IOKXX5AATU2WR3V76X5Y3A44QAATG"},{"type":"WEB","url":"https://seemann.io/posts/2023-12-18-exploiting-quics-path-validation"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:44.574602244Z"}}