{"id":"ALSA-2021:4451","summary":"Moderate: gnutls and nettle security, bug fix, and enhancement update","details":"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.","modified":"2026-02-04T04:12:49.377116Z","published":"2021-11-09T09:23:20Z","related":["CVE-2021-20231","CVE-2021-20232","CVE-2021-3580"],"references":[{"type":"ADVISORY","url":"https://errata.almalinux.org/8/ALSA-2021-4451.html"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-20231"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-20232"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-3580"}],"affected":[{"package":{"name":"gnutls","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/gnutls"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.16-4.el8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4451.json"}},{"package":{"name":"gnutls-c++","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/gnutls-c%2B%2B"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.16-4.el8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4451.json"}},{"package":{"name":"gnutls-dane","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/gnutls-dane"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.16-4.el8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4451.json"}},{"package":{"name":"gnutls-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/gnutls-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.16-4.el8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4451.json"}},{"package":{"name":"gnutls-utils","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/gnutls-utils"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.16-4.el8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4451.json"}},{"package":{"name":"nettle","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/nettle"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.1-7.el8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4451.json"}},{"package":{"name":"nettle-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/nettle-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.1-7.el8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4451.json"}}],"schema_version":"1.7.3"}