


SELinux performance has been substantially improved, including time to load SELinux policy into the kernel, memory overhead, and other parameters. SFTP offers more predictable filename handling and does not require expansion of glob(3) patterns by the shell on the remote side. The SFTP protocol replaces the previously used SCP/RCP protocol in OpenSSH. OpenSSH is distributed in version 8.7p1, which provides many enhancements, bug fixes, and security improvements as compared to version 8.0p1, which is distributed in RHEL 8.5. The system-wide cryptographic policies have been adjusted to provide up-to-date secure defaults. OpenSSL is now provided in version 3.0.1, which adds a provider concept, a new versioning scheme, an improved HTTP(S) client, support for new protocols, formats, and algorithms, and many other improvements.
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Applications in RHEL 9 have been updated to avoid using SHA-1 in security-relevant use cases.Īmong the exceptions, the HMAC-SHA1 message authentication code and the Universal Unique Identifier (UUID) values can still be created using SHA-1 because these use cases do not currently pose security risks. The RHEL core crypto components no longer create signatures using SHA-1 by default. The digest produced by SHA-1 is not considered secure because of many documented successful attacks based on finding hash collisions. The usage of the SHA-1 message digest for cryptographic purposes has been deprecated in RHEL 9. Dynamic programming languages, web and database serversħ.9. Deprecated functionality"Ĭollapse section "7. Red Hat Enterprise Linux System RolesĬollapse section "6. Red Hat Enterprise Linux System Rolesĥ.12. Dynamic programming languages, web and database serversĤ.19. Distribution of content in RHEL 9"Ĭollapse section "3. Providing feedback on Red Hat documentationĮxpand section "3.
