{"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":"2026-04-10T04:21:46.916717Z","published":"2020-04-03T13:15:13.170Z","related":["CGA-4ffp-6g99-3qch","MGASA-2020-0168","SUSE-SU-2020:0948-1","SUSE-SU-2020:0948-2","openSUSE-SU-2020:0501-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/"},{"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":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00015.html"},{"type":"FIX","url":"https://gitlab.com/gnutls/gnutls/-/issues/960"},{"type":"FIX","url":"https://gitlab.com/gnutls/gnutls/-/commit/5b595e8e52653f6c5726a4cdd8fddeb6e83804d2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/gnutls/gnutls","events":[{"introduced":"c87f22eec1b412aaafa873ff81b02f52532bfa79"},{"fixed":"5b595e8e52653f6c5726a4cdd8fddeb6e83804d2"}],"database_specific":{"versions":[{"introduced":"3.6.3"},{"fixed":"3.6.13"}]}},{"type":"GIT","repo":"https://gitlab.com/gnutls/gnutls","events":[{"introduced":"0"},{"fixed":"5b595e8e52653f6c5726a4cdd8fddeb6e83804d2"}]}],"versions":["3.6.12","gnutls-0-0-7","gnutls-0-1-0-srp","gnutls-0_1_2","gnutls-3_0_12","gnutls0-0-4","gnutls0-0-5","gnutls0-0-6","gnutls_0_1_4","gnutls_0_1_9","gnutls_0_2_0","gnutls_0_2_1","gnutls_0_2_10","gnutls_0_2_11","gnutls_0_2_2","gnutls_0_2_3","gnutls_0_2_4","gnutls_0_2_9","gnutls_0_2_90","gnutls_0_2_91","gnutls_0_3_0","gnutls_0_3_1","gnutls_0_3_2","gnutls_0_3_90","gnutls_0_3_91","gnutls_0_3_92","gnutls_0_4_0","gnutls_0_4_1","gnutls_0_4_2","gnutls_0_4_3","gnutls_0_4_with_libtasn1","gnutls_0_5_0","gnutls_0_5_1","gnutls_0_5_10","gnutls_0_5_11","gnutls_0_5_4","gnutls_0_5_5","gnutls_0_5_6","gnutls_0_5_7","gnutls_0_5_8","gnutls_0_5_9","gnutls_0_5_x_before_export_ciphersuites","gnutls_0_5_x_before_int_fixes","gnutls_0_5_x_before_types_change","gnutls_0_5_x_with_export_ciphersuites","gnutls_0_6_0","gnutls_0_8_0","gnutls_0_8_1","gnutls_0_9_1","gnutls_0_9_2","gnutls_0_9_3","gnutls_0_9_4","gnutls_0_9_5","gnutls_0_9_6","gnutls_0_9_7","gnutls_0_9_8","gnutls_0_9_90","gnutls_0_9_91","gnutls_0_9_92","gnutls_0_9_93","gnutls_0_9_94","gnutls_0_9_95","gnutls_0_9_96","gnutls_0_9_97","gnutls_0_9_98","gnutls_0_9_99","gnutls_1_0_0","gnutls_1_0_20","gnutls_1_0_21","gnutls_1_0_22","gnutls_1_0_23","gnutls_1_0_24","gnutls_1_0_25","gnutls_1_1_0","gnutls_1_1_1","gnutls_1_1_10","gnutls_1_1_11","gnutls_1_1_12","gnutls_1_1_13","gnutls_1_1_14","gnutls_1_1_15","gnutls_1_1_16","gnutls_1_1_17","gnutls_1_1_18","gnutls_1_1_19","gnutls_1_1_2","gnutls_1_1_20","gnutls_1_1_21","gnutls_1_1_22","gnutls_1_1_23","gnutls_1_1_3","gnutls_1_1_4","gnutls_1_1_5","gnutls_1_1_6","gnutls_1_1_7","gnutls_1_1_7_pre0","gnutls_1_1_8","gnutls_1_1_9","gnutls_1_2_0","gnutls_1_2_1","gnutls_1_2_10","gnutls_1_2_11","gnutls_1_2_2","gnutls_1_2_3","gnutls_1_2_4","gnutls_1_2_5","gnutls_1_2_6","gnutls_1_2_7","gnutls_1_2_8","gnutls_1_2_9","gnutls_1_3_0","gnutls_1_3_1","gnutls_1_3_2","gnutls_1_3_3","gnutls_1_3_4","gnutls_1_3_5","gnutls_1_4_0","gnutls_1_4_1","gnutls_1_4_2","gnutls_1_5_0","gnutls_1_5_1","gnutls_1_5_2","gnutls_1_5_3","gnutls_1_5_4","gnutls_1_5_5","gnutls_1_6_0","gnutls_1_6_1","gnutls_1_7_0","gnutls_1_7_1","gnutls_1_7_10","gnutls_1_7_11","gnutls_1_7_12","gnutls_1_7_13","gnutls_1_7_14","gnutls_1_7_15","gnutls_1_7_16","gnutls_1_7_17","gnutls_1_7_18","gnutls_1_7_19","gnutls_1_7_2","gnutls_1_7_3","gnutls_1_7_4","gnutls_1_7_5","gnutls_1_7_6","gnutls_1_7_7","gnutls_1_7_8","gnutls_1_7_9","gnutls_2_0_0","gnutls_2_0_1","gnutls_2_11_3","gnutls_2_11_4","gnutls_2_11_5","gnutls_2_11_6","gnutls_2_1_0","gnutls_2_1_1","gnutls_2_1_2","gnutls_2_1_3","gnutls_2_1_4","gnutls_2_1_5","gnutls_2_1_6","gnutls_2_1_7","gnutls_2_1_8","gnutls_2_3_0","gnutls_2_3_1","gnutls_2_3_10","gnutls_2_3_11","gnutls_2_3_12","gnutls_2_3_13","gnutls_2_3_14","gnutls_2_3_15","gnutls_2_3_3","gnutls_2_3_5","gnutls_2_3_6","gnutls_2_3_7","gnutls_2_3_8","gnutls_2_3_9","gnutls_2_4_0","gnutls_2_5_0","gnutls_2_5_1","gnutls_2_5_2","gnutls_2_5_3","gnutls_2_5_4","gnutls_2_5_6","gnutls_2_5_7","gnutls_2_5_8","gnutls_2_7_0","gnutls_2_7_1","gnutls_2_7_10","gnutls_2_7_11","gnutls_2_7_12","gnutls_2_7_3","gnutls_2_7_4","gnutls_2_7_5","gnutls_2_7_6","gnutls_2_7_7","gnutls_2_7_8","gnutls_2_7_9","gnutls_2_99_0","gnutls_2_99_1","gnutls_2_99_2","gnutls_2_99_3","gnutls_2_99_4","gnutls_2_9_10","gnutls_2_9_2","gnutls_2_9_3","gnutls_2_9_4","gnutls_2_9_5","gnutls_2_9_6","gnutls_2_9_7","gnutls_2_9_8","gnutls_2_9_9","gnutls_3_0_0","gnutls_3_0_10","gnutls_3_0_11","gnutls_3_0_13","gnutls_3_0_14","gnutls_3_0_15","gnutls_3_0_16","gnutls_3_0_17","gnutls_3_0_18","gnutls_3_0_2","gnutls_3_0_21","gnutls_3_0_3","gnutls_3_0_4","gnutls_3_0_5","gnutls_3_0_6","gnutls_3_0_7","gnutls_3_0_8","gnutls_3_0_9","gnutls_3_1_0","gnutls_3_1_0pre0","gnutls_3_1_2","gnutls_3_1_3","gnutls_3_1_4","gnutls_3_1_5","gnutls_3_1_6","gnutls_3_1_7","gnutls_3_1_8","gnutls_3_1_9","gnutls_3_2_0","gnutls_3_2_2","gnutls_3_2_3","gnutls_3_2_3pre0","gnutls_3_2_4","gnutls_3_2_5","gnutls_3_2_6","gnutls_3_3_0","gnutls_3_3_1","gnutls_3_3_2","gnutls_3_3_3","gnutls_3_3_4","gnutls_3_3_5","gnutls_3_3_6","gnutls_3_4_0","gnutls_3_4_1","gnutls_3_4_2","gnutls_3_4_3","gnutls_3_5_0","gnutls_3_5_1","gnutls_3_5_2","gnutls_3_5_3","gnutls_3_5_4","gnutls_3_5_5","gnutls_3_5_7","gnutls_3_6_0","gnutls_3_6_0_1","gnutls_3_6_1","gnutls_3_6_10","gnutls_3_6_11","gnutls_3_6_11_1","gnutls_3_6_12","gnutls_3_6_2","gnutls_3_6_3","gnutls_3_6_4","gnutls_3_6_5","gnutls_3_6_6","gnutls_3_6_7","gnutls_3_6_9"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"19.10"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"31"}]},{"events":[{"introduced":"0"},{"last_affected":"32"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-11501.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:H/A:N"}]}