Synopsis: ELSA-2021-4424 can now be patched using Ksplice CVEs: CVE-2021-23840 CVE-2021-23841
Users with Oracle Linux Premier Support can now use Ksplice to patch against the latest Oracle Linux Security Advisory, ELSA-2021-4424. INSTALLING THE UPDATES We recommend that all users of Ksplice on OL 8 install these updates. You can install these updates by running: # ksplice -y user upgrade 32-bit applications should be restarted after upgrading the on-disk openssl RPMs and statically linked applications using openssl should be rebuilt to include these fixes. Ksplice user-space patching requires installation of Ksplice-aware packages and the system must be rebooted after the first installation of these packages. Refer to the installation instructions for the Enhanced Ksplice Client in the Ksplice User's Guide for more details. Systems may be prepared for Ksplice patching by installing the Ksplice aware packages in advance, prior to installing the enhanced Ksplice client. DESCRIPTION * CVE-2021-23841: Denial-of-service when using X509_issuer_and_serial_hash() A wrong error handling when using X509_issuer_and_serial_hash() could lead to a NULL pointer dereference. A remote attacker could use this flaw and a handcrafted X509 certificate to cause a denial-of-service. * CVE-2021-23840: Denial-of-service in CipherUpdate. A missing check when using CipherUpdate could lead to an integer overflow. A local attacker could use this flaw to cause a denial-of- service. SUPPORT Ksplice support is available at [email protected]. _______________________________________________ El-errata mailing list [email protected] https://oss.oracle.com/mailman/listinfo/el-errata
