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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.2273 kernel-rt security and bug fix update 30 June 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-33034 CVE-2020-26541 Reference: ESB-2021.2262 ESB-2021.2249 ESB-2021.2217 ESB-2021.2184 Original Bulletin: https://access.redhat.com/errata/RHSA-2021:2599 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2021:2599-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:2599 Issue date: 2021-06-29 CVE Names: CVE-2020-26541 CVE-2021-33034 ===================================================================== 1. Summary: An update for kernel-rt is now available for Red Hat Enterprise Linux 8. 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 Real Time (v. 8) - x86_64 Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64 3. Description: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034) * kernel: security bypass in certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541) 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. Bug Fix(es): * kernel-rt: update RT source tree to the RHEL-8.4.z1 source tree (BZ#1965378) * panic caused by i40e_msix_clean_rings [rhel-rt] (BZ#1965970) 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 The system must be rebooted for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1886285 - CVE-2020-26541 kernel: security bypass in certs/blacklist.c and certs/system_keyring.c 1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan 6. Package List: Red Hat Enterprise Linux Real Time for NFV (v. 8): Source: kernel-rt-4.18.0-305.7.1.rt7.79.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm Red Hat Enterprise Linux Real Time (v. 8): Source: kernel-rt-4.18.0-305.7.1.rt7.79.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.7.1.rt7.79.el8_4.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-2020-26541 https://access.redhat.com/security/cve/CVE-2021-33034 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 2021 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYNs6MtzjgjWX9erEAQj3Ww//dABvyoLW6MKksHOYu8yNVHDFXmfJnphL vLQHKmT1FdYCNMwNDVihUosi1fTzvsis6TNQf/bfwCOlVcNXG88HPuAE8tQ4Knde FuWRCkOvixa6spmR+YzW2cnB9WVIHRLy88t/bmtb4tzw14FIZmkE5fZ4A3E6+2A6 TtLXb0IRZ6QayO48QEmKA42SYMDmQA3KxqRRIaD9bTlpzkFEeDYlCYtwHDMFsPTG z9Z8GMCDhezj/MzgMqyKOhKac9n16SDudgMbqfBZ3y1UQwhaQ0Bim8Oa4Ev8H+dV UGP5DBLUSdDznt8Yvai4o5fs+Z7p1yk2tpEmODpbjwHPgacvivtq0fJyHu3waTrR FiXVLzLTZb12iKkZ66PvhWfm9yDBrFiCgkrcza9i/w2Eeto35A1NVeAzSbuG1wYj eOHY2KJjNV2DjVOLhUfie0EqmfZp5QZToTb3gPgS/TbkuEVipyh6YuLHO4KHAYyx /ycutMbB8oKEDXB6u5+r4c3+AWcgtUuxu94v8zJaZ8DOSBrFFfiEQq62HHaAl78w cyJufkz7DZpbz6LBM7cIX3WtBStA4j/yPSQv+IfO/pEDLFtuPQjrUajOE6F3Qjrb vVACUhKvKfI8BYlJOh5g4x9A9YvZtwymuTYo+rQuoxnLleYL+1ZTqDrKQiUuy6aB gwTAIbd4zjs= =4Aza - -----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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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYNvtzONLKJtyKPYoAQgtgw/8COvUlZDFChVfpup9dttcNnI2NqcNYzcE hxUdY26ZbF8UvPbmRQ/mr1tG7F0AQJROYd/xOTPyFGLeMx7RlOp2HEuu/HIxtWwu H2xJKsUFA5LtRKOBOYBQxByNPAm6q371o+Vgy1XpCZEzkarwxl6nCpWugV32cLuZ P5YMB508L5sSicsyXL1arkvH9Y9I2RcYYqd5ObQEaoQ0BPN/Q0C62LSLl0LEhbX+ DN8GJqAs4tQ6J6SGo5zj3/222zgT/Aa5qLeFKBBQ/Uqg2VAIShfOyHNNl0XBKX3M 5Czr8D8JjLJ8x85WKapnEZcYeY8A35IFAnSgooFFZor+cER8N7lcGHykRdpAU/cu c8BObvUSMCetsJ/KknmK2Nz9O4g1FbBe7juvpqeDwovTmAk5QZXcuVyya+rfu2Nh V3G32E6uL264/WwlX0kKVqosFBMqUmyJoX4LeX/rpzzFRlo8Q6rV6voDtNcUd9KI QA8flktw/CP9VDjjiMiAADg82ApEVfP216cunPmzKDyAls2oPMEy/fDiGst5vJ+j IfAxB2gM6jZZSElcjMfcNfuviUMgZO1WYWSJYDddsA7pWQGN45zJQkMhFHVvnNRQ VC/unRcwqaN0f+0o/x/LKXoD2w2i1WHVvDBpRrBwLv0Qo+xp0Ih+GOuygJcw54Uj l4vmboxTS0I= =Q64s -----END PGP SIGNATURE-----