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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2662 kpatch-patch security update 5 August 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kpatch-patch Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 8 Red Hat Enterprise Linux WS/Desktop 8 Impact/Access: Access Privileged Data -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-10768 CVE-2020-10767 CVE-2020-10766 Reference: ESB-2020.2504 Original Bulletin: https://access.redhat.com/errata/RHSA-2020:3297 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kpatch-patch security update Advisory ID: RHSA-2020:3297-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2020:3297 Issue date: 2020-08-04 CVE Names: CVE-2020-10766 CVE-2020-10767 CVE-2020-10768 ===================================================================== 1. Summary: An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.1 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux BaseOS EUS (v. 8.1) - x86_64 3. Description: This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. Security Fix(es): * kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection. (CVE-2020-10766) * kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available. (CVE-2020-10767) * kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768) For 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. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1845840 - CVE-2020-10766 kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection. 1845867 - CVE-2020-10767 kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available. 1845868 - CVE-2020-10768 kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. 6. Package List: Red Hat Enterprise Linux BaseOS EUS (v. 8.1): Source: kpatch-patch-4_18_0-147-1-16.el8.src.rpm kpatch-patch-4_18_0-147_0_2-1-12.el8.src.rpm kpatch-patch-4_18_0-147_0_3-1-12.el8.src.rpm kpatch-patch-4_18_0-147_13_2-1-3.el8_1.src.rpm kpatch-patch-4_18_0-147_20_1-1-2.el8_1.src.rpm kpatch-patch-4_18_0-147_3_1-1-12.el8_1.src.rpm kpatch-patch-4_18_0-147_5_1-1-7.el8_1.src.rpm kpatch-patch-4_18_0-147_8_1-1-5.el8_1.src.rpm x86_64: kpatch-patch-4_18_0-147-1-16.el8.x86_64.rpm kpatch-patch-4_18_0-147-debuginfo-1-16.el8.x86_64.rpm kpatch-patch-4_18_0-147-debugsource-1-16.el8.x86_64.rpm kpatch-patch-4_18_0-147_0_2-1-12.el8.x86_64.rpm kpatch-patch-4_18_0-147_0_2-debuginfo-1-12.el8.x86_64.rpm kpatch-patch-4_18_0-147_0_2-debugsource-1-12.el8.x86_64.rpm kpatch-patch-4_18_0-147_0_3-1-12.el8.x86_64.rpm kpatch-patch-4_18_0-147_13_2-1-3.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_13_2-debuginfo-1-3.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_13_2-debugsource-1-3.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_20_1-1-2.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_20_1-debuginfo-1-2.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_20_1-debugsource-1-2.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_3_1-1-12.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_5_1-1-7.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_8_1-1-5.el8_1.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2020-10766 https://access.redhat.com/security/cve/CVE-2020-10767 https://access.redhat.com/security/cve/CVE-2020-10768 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2020 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBXykRHtzjgjWX9erEAQiVaBAAnag+v/MOQvTK1PFcOUk6Dw2+aPuq2JTT TyrLP/D0a0D9DlOh/YBHtLXf6J309gRBGKnVuFWIDJDRr+wlqDkE91VvRm0xu85Q TJh1lf2I/DVxIZZTS4hARbB6hVvN8i+k/NhfeGTphVnEQ70c0z8SMR4aNUu2nbgk bIu/Vn0DjqfUQ3K5kKdYWmrD6osG1heTfZpo+nXGy2Y/cxk/LJxymXiF+/FDVpPr 3G9krOSyiwN9cS7RHSdqV/BfKlZypqBHmo21m3jufgRoyjf7anI13wdGfARP3pq1 mD68P1UztY/eQjZMS8RhjicF3vRXlQ8NZXKs+rbj9NEGRQbj74F1vcyoQwWgq9NX xbpd6zWBgZ3HsXnyola/Of9LJhxHzGI7s7WQcVCaVWjHMUC/xsfxVrutqXn3xAmN HFoRNnZrrjn/iA2/KrA+rNkBvyA+fi2FvZLk0m75MwrpjD7IF+auj1hhB5mnwh5B Pmbe+0gZUNAHkW4bYXR/CXA6S+aoCfLIuYdq11fJzTmtcaZIseIo24iVaA/bVRaD 1bd+oa7LaLabz0PJrGMjWLF/RRxdagtIwObc9rw2lvt81isxB8q+mi/o78fJyn3m DPslv2uqLNYPEUBs7TbxPSIVsBEVVaoI+Ohw/DXSZflTGVOuqRFMcgNP7m+wwF95 rQOVAWajASI= =s8A3 - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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