{"id":"RLSA-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 Rocky Linux 8.5 Release Notes linked from the References section.","modified":"2026-02-05T09:30:13.738898Z","published":"2021-11-09T09:23:20Z","upstream":["CVE-2021-20231","CVE-2021-20232","CVE-2021-3580"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:4451"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1776250"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1908110"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1908334"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1922275"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1922276"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1965445"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1967983"}],"affected":[{"package":{"name":"gnutls","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/gnutls?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:3.6.16-4.el8"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4451.json"}},{"package":{"name":"nettle","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/nettle?distro=rocky-linux-8&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:3.4.1-7.el8"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4451.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}