{"id":"CVE-2020-11501","details":"GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3.6.3 (2018-07-16) because of an error in a 2017-10-06 commit. The DTLS client always uses 32 '\\0' bytes instead of a random value, and thus contributes no randomness to a DTLS negotiation. This breaks the security guarantees of the DTLS protocol.","modified":"2026-08-07T11:48:26.445320505Z","published":"2020-04-03T13:15:13.170Z","related":["CGA-4ffp-6g99-3qch","SUSE-SU-2020:0948-1","SUSE-SU-2020:0948-2","openSUSE-SU-2020:0501-1"],"database_specific":{"unresolved_ranges":[{"vendor_product":"canonical:ubuntu_linux","cpes":["cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"19.10"},{"last_affected":"19.10"}],"source":"CPE_STRING"},{"cpes":["cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"10.0"},{"last_affected":"10.0"}],"source":"CPE_STRING","vendor_product":"debian:debian_linux"},{"vendor_product":"fedoraproject:fedora","cpes":["cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"31"},{"last_affected":"31"},{"introduced":"32"},{"last_affected":"32"}],"source":"CPE_STRING"},{"vendor_product":"opensuse:leap","cpes":["cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"15.1"},{"last_affected":"15.1"}],"source":"CPE_STRING"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00015.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202004-06"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20200416-0002/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4322-1/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2020/dsa-4652"},{"type":"ADVISORY","url":"https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-03-31"},{"type":"FIX","url":"https://gitlab.com/gnutls/gnutls/-/commit/5b595e8e52653f6c5726a4cdd8fddeb6e83804d2"},{"type":"FIX","url":"https://gitlab.com/gnutls/gnutls/-/issues/960"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/gnutls/gnutls","events":[{"introduced":"c87f22eec1b412aaafa873ff81b02f52532bfa79"},{"fixed":"5b595e8e52653f6c5726a4cdd8fddeb6e83804d2"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.6.3"},{"fixed":"3.6.13"}]}}],"versions":["gnutls_3_6_12","3.6.12","gnutls_3_6_11_1","gnutls_3_6_11","gnutls_3_6_10","gnutls_3_6_9","gnutls_3_6_7","gnutls_3_6_6","gnutls_3_6_5","gnutls_3_6_4","gnutls_3_6_3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-11501.json"}},{"ranges":[{"type":"GIT","repo":"https://gitlab.com/gnutls/gnutls","events":[{"introduced":"c87f22eec1b412aaafa873ff81b02f52532bfa79"},{"fixed":"5b595e8e52653f6c5726a4cdd8fddeb6e83804d2"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.6.3"},{"fixed":"3.6.13"}]}}],"versions":["gnutls_3_6_12","3.6.12","gnutls_3_6_11_1","gnutls_3_6_11","gnutls_3_6_10","gnutls_3_6_9","gnutls_3_6_7","gnutls_3_6_6","gnutls_3_6_5","gnutls_3_6_4","gnutls_3_6_3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-11501.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}