{"id":"CVE-2021-32921","aliases":["ALPINE-CVE-2021-32921","DEBIAN-CVE-2021-32921","DLA-2687-1","DSA-4916-1","EUVD-2021-19643","GHSA-vh63-h6gp-hw6w","UBUNTU-CVE-2021-32921"],"status":"published","title":"An issue was discovered in Prosody before 0.11.9. It does not use a constant-time algorithm for...","description":"An issue was discovered in Prosody before 0.11.9. It does not use a constant-time algorithm for comparing certain secret strings when running under Lua 5.2 or later. 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Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32921"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/"},{"url":"https://github.com/advisories/GHSA-vh63-h6gp-hw6w"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-32921","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-32921","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-32921","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2021/05/13/1","tags":["report"]},{"url":"https://prosody.im/security/advisory_20210512.txt","tags":["report"]},{"url":"https://hg.prosody.im/trunk/rev/c98aebe601f9","tags":["report"]},{"url":"https://hg.prosody.im/trunk/rev/13b84682518e","tags":["report"]},{"url":"https://hg.prosody.im/trunk/rev/6f56170ea986","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-32921","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-32921","description":"An issue was discovered in Prosody before 0.11.9. It does not use a constant-time algorithm for comparing certain secret strings when running under Lua 5.2 or later. This can potentially be used in a timing attack to reveal the contents of secret strings to an attacker.","status":"published","published":"2021-05-13T15:14:43Z","modified":"2024-08-03T23:33:56.162Z","updated_at":"2026-11-02T14:33:07.014772Z"}],"euvd":[{"id":"EUVD-2021-19643","description":"An issue was discovered in Prosody before 0.11.9. It does not use a constant-time algorithm for comparing certain secret strings when running under Lua 5.2 or later. This can potentially be used in a timing attack to reveal the contents of secret strings to an attacker.","status":"published","published":"2021-05-13T15:14:43Z","modified":"2024-08-03T23:33:56Z","updated_at":"2026-11-03T03:24:35.30045Z"}],"ghsa":[{"id":"GHSA-vh63-h6gp-hw6w","title":"An issue was discovered in Prosody before 0.11.9. 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