{"id":"CVE-2021-20232","aliases":["ALPINE-CVE-2021-20232","ALSA-2021:4451","AZL-6447","BELL-CVE-2021-20232","DEBIAN-CVE-2021-20232","EUVD-2021-7671","GHSA-p947-gfm7-f4g7","JLSEC-2026-521","OESA-2021-1109","RHSA-2021:4451","RLSA-2021:4451","SUSE-SU-2021:0934-1","SUSE-SU-2021:0935-1","UBUNTU-CVE-2021-20232","USN-5029-1","openSUSE-SU-2021:0470-1","openSUSE-SU-2024:10801-1"],"status":"published","title":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext...","description":"A flaw was found in gnutls. 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flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.","status":"published","published":"2021-03-12T18:25:29Z","modified":"2026-10-14T10:04:14.03Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-7671","description":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.","status":"published","published":"2021-03-12T18:25:29Z","modified":"2026-10-14T10:04:14Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T17:27:16.85534Z"}],"ghsa":[{"id":"GHSA-p947-gfm7-f4g7","title":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext...","description":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.","status":"published","published":"2022-05-24T17:44:28Z","modified":"2026-10-14T12:32:24Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:13:24.812204Z"}],"nvd":[{"id":"CVE-2021-20232","description":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.","status":"published","published":"2021-03-12T19:15:13.13Z","modified":"2026-10-14T11:16:51.67Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:06:50.805771Z"}],"osv":[{"id":"ALPINE-CVE-2021-20232","description":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.","status":"published","published":"2021-03-12T19:15:13.13Z","modified":"2026-10-23T17:17:56.142352216Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:27:48.646074Z"},{"id":"AZL-6447","title":"CVE-2021-20232 affecting package gnutls for versions less than 3.6.14-5","description":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.","status":"published","published":"2021-03-12T19:15:13Z","modified":"2026-04-21T04:32:25.902789Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:28:08.076947Z"},{"id":"BELL-CVE-2021-20232","title":"CVE-2021-20232 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:16:22.302501Z","modified":"2026-01-26T09:46:00.723545Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:28:15.925958Z"},{"id":"CVE-2021-20232","description":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.","status":"published","published":"2021-03-12T19:15:13.13Z","modified":"2026-10-24T10:30:58.337152532Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:18.004149Z"},{"id":"DEBIAN-CVE-2021-20232","description":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.","status":"published","published":"2021-03-12T19:15:13.13Z","modified":"2026-10-15T09:47:42.003477627Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:34.311861Z"},{"id":"JLSEC-2026-521","description":"A flaw was found in gnutls. A use after free issue in `client_send_params` in `lib/ext/pre_shared_key.c` may lead to memory corruption and other potential consequences.","status":"published","published":"2026-05-26T14:17:50.003Z","modified":"2026-07-25T18:24:33.707298002Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:47:18.573531Z"},{"id":"OESA-2021-1109","title":"gnutls security update","description":"GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.\r\n\r\nSecurity Fix(es):\r\n\r\nA flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.(CVE-2021-20231)\r\n\r\nA flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.(CVE-2021-20232)","status":"published","published":"2021-04-07T11:04:20Z","modified":"2026-08-18T01:15:23.13519602Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:38.987987Z"},{"id":"RHSA-2021:4451","title":"Red Hat Security Advisory: gnutls and nettle security, bug fix, and enhancement update","status":"published","published":"2024-09-16T06:06:07Z","modified":"2026-10-15T10:02:10Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RLSA-2021:4451","title":"Moderate: gnutls and nettle security, bug fix, and enhancement update","description":"The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.\n\nNettle is a cryptographic library that is designed to fit easily in almost any context: In crypto toolkits for object-oriented languages, such as C++, Python, or Pike, in applications like LSH or GNUPG, or even in kernel space.\n\nThe following packages have been upgraded to a later upstream version: gnutls (3.6.16). (BZ#1956783)\n\nSecurity Fix(es):\n\n* nettle: Remote crash in RSA decryption via manipulated ciphertext (CVE-2021-3580)\n\n* gnutls: Use after free in client key_share extension (CVE-2021-20231)\n\n* gnutls: Use after free in client_send_params in lib/ext/pre_shared_key.c (CVE-2021-20232)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 8.5 Release Notes linked from the References section.","status":"published","published":"2021-11-09T09:23:20Z","modified":"2026-02-05T09:30:13.738898Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.969672Z"},{"id":"UBUNTU-CVE-2021-20232","description":"A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.","status":"published","published":"2021-03-12T19:15:00Z","modified":"2026-04-22T12:45:04.450706Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:25.728622Z"},{"id":"ALSA-2021:4451","title":"Moderate: gnutls and nettle security, bug fix, and enhancement update","description":"The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.\n\nNettle is a cryptographic library that is designed to fit easily in almost any context: In crypto toolkits for object-oriented languages, such as C++, Python, or Pike, in applications like LSH or GNUPG, or even in kernel space.\n\nThe following packages have been upgraded to a later upstream version: gnutls (3.6.16). (BZ#1956783)\n\nSecurity Fix(es):\n\n* nettle: Remote crash in RSA decryption via manipulated ciphertext (CVE-2021-3580)\n\n* gnutls: Use after free in client key_share extension (CVE-2021-20231)\n\n* gnutls: Use after free in client_send_params in lib/ext/pre_shared_key.c (CVE-2021-20232)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.","status":"published","published":"2021-11-09T09:23:20Z","modified":"2026-10-29T11:01:41.879921194Z","updated_at":"2026-11-02T15:27:51.196609Z"},{"id":"openSUSE-SU-2021:0470-1","title":"Security update for gnutls","description":"This update for gnutls fixes the following issues:\n\n- CVE-2021-20232: Fixed a use after free issue which could have led to memory corruption and other potential consequences (bsc#1183456).\n- CVE-2021-20231: Fixed a use after free issue which could have led to memory corruption and other potential consequences (bsc#1183457).\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2021-03-25T08:10:53Z","modified":"2026-02-04T02:39:56.95733Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:10801-1","title":"gnutls-3.7.2-1.2 on GA media","description":"These are all security issues fixed in the gnutls-3.7.2-1.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:36:06.109989Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2021:0934-1","title":"Security update for gnutls","description":"This update for gnutls fixes the following issues:\n\n- CVE-2021-20232: Fixed a use after free issue which could have led to memory corruption and other potential consequences (bsc#1183456).\n- CVE-2021-20231: Fixed a use after free issue which could have led to memory corruption and other potential consequences (bsc#1183457).\n","status":"published","published":"2021-03-24T11:18:49Z","modified":"2026-02-04T04:25:10.635429Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0935-1","title":"Security update for gnutls","description":"This update for gnutls fixes the following issues:\n\n- CVE-2021-20232: Fixed a use after free issue which could have led to memory corruption and other potential consequences (bsc#1183456).\n- CVE-2021-20231: Fixed a use after free issue which could have led to memory corruption and other potential consequences (bsc#1183457).\n","status":"published","published":"2021-03-24T11:19:19Z","modified":"2026-02-04T02:30:33.25276Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"USN-5029-1","title":"gnutls28 vulnerabilities","description":"It was discovered that GnuTLS incorrectly handled sending certain\nextensions when being used as a client. A remote attacker could use this\nissue to cause GnuTLS to crash, resulting in a denial of service, or\npossibly execute arbitrary code.\n","status":"published","published":"2021-08-02T17:25:02Z","modified":"2026-04-22T10:17:09.006025Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}