{"id":"CVE-2021-43565","aliases":["GHSA-gwc9-m7rh-j2ww","GO-2022-0968"],"url":"https://o3.security/vulnerability/CVE-2021-43565","summary":"x/crypto/ssh vulnerable to panic via malformed packets","details":"The x/crypto/ssh package before 0.0.0-20211202192323-5770296d904e of golang.org/x/crypto allows an unauthenticated attacker to panic an SSH server. When using AES-GCM or ChaCha20Poly1305, consuming a malformed packet which contains an empty plaintext causes a panic.","published":"2022-09-06T18:15:10.297Z","modified":"2026-06-24T09:14:23.658775119Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"golang.org/x/crypto","fixedVersion":"0.0.0-20211202192323-5770296d904e"}],"fix":null,"references":[{"type":"WEB","url":"https://groups.google.com/forum/#%21forum/golang-announce"},{"type":"REPORT","url":"https://groups.google.com/g/golang-announce/c/2AR1sKiM-Qs"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43565"},{"type":"WEB","url":"https://go.dev/cl/368814"},{"type":"WEB","url":"https://go.dev/issues/49932"},{"type":"WEB","url":"https://groups.google.com/forum/#!forum/golang-announce"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2022-0968"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-06-24T09:14:23.658775119Z"}}