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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.3141 Moderate: grub2 security and bug fix update 16 December 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: grub2 Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 7 Red Hat Enterprise Linux WS/Desktop 7 Impact/Access: Administrator Compromise -- Console/Physical Resolution: Patch/Upgrade CVE Names: CVE-2015-8370 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2015-2623.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: grub2 security and bug fix update Advisory ID: RHSA-2015:2623-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-2623.html Issue date: 2015-12-15 CVE Names: CVE-2015-8370 ===================================================================== 1. Summary: Updated grub2 packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64 3. Description: The grub2 packages provide version 2 of the Grand Unified Bootloader (GRUB), a highly configurable and customizable bootloader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. A flaw was found in the way the grub2 handled backspace characters entered in username and password prompts. An attacker with access to the system console could use this flaw to bypass grub2 password protection and gain administrative access to the system. (CVE-2015-8370) This update also fixes the following bug: * When upgrading from Red Hat Enterprise Linux 7.1 and earlier, a configured boot password was not correctly migrated to the newly introduced user.cfg configuration files. This could possibly prevent system administrators from changing grub2 configuration during system boot even if they provided the correct password. This update corrects the password migration script and the incorrectly generated user.cfg file. (BZ#1290089) All grub2 users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1286966 - CVE-2015-8370 grub2: buffer overflow when checking password entered during bootup 1290089 - Grub password broken by update from RHEL7.1 to RHEL7.2 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: grub2-2.02-0.33.el7_2.src.rpm x86_64: grub2-2.02-0.33.el7_2.x86_64.rpm grub2-debuginfo-2.02-0.33.el7_2.x86_64.rpm grub2-efi-2.02-0.33.el7_2.x86_64.rpm grub2-tools-2.02-0.33.el7_2.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: grub2-debuginfo-2.02-0.33.el7_2.x86_64.rpm grub2-efi-modules-2.02-0.33.el7_2.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: grub2-2.02-0.33.el7_2.src.rpm x86_64: grub2-2.02-0.33.el7_2.x86_64.rpm grub2-debuginfo-2.02-0.33.el7_2.x86_64.rpm grub2-efi-2.02-0.33.el7_2.x86_64.rpm grub2-tools-2.02-0.33.el7_2.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): x86_64: grub2-debuginfo-2.02-0.33.el7_2.x86_64.rpm grub2-efi-modules-2.02-0.33.el7_2.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: grub2-2.02-0.33.el7_2.src.rpm aarch64: grub2-debuginfo-2.02-0.33.el7_2.aarch64.rpm grub2-efi-2.02-0.33.el7_2.aarch64.rpm grub2-tools-2.02-0.33.el7_2.aarch64.rpm ppc64: grub2-2.02-0.33.el7_2.ppc64.rpm grub2-debuginfo-2.02-0.33.el7_2.ppc64.rpm grub2-tools-2.02-0.33.el7_2.ppc64.rpm ppc64le: grub2-2.02-0.33.el7_2.ppc64le.rpm grub2-debuginfo-2.02-0.33.el7_2.ppc64le.rpm grub2-tools-2.02-0.33.el7_2.ppc64le.rpm x86_64: grub2-2.02-0.33.el7_2.x86_64.rpm grub2-debuginfo-2.02-0.33.el7_2.x86_64.rpm grub2-efi-2.02-0.33.el7_2.x86_64.rpm grub2-tools-2.02-0.33.el7_2.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): aarch64: grub2-debuginfo-2.02-0.33.el7_2.aarch64.rpm grub2-efi-modules-2.02-0.33.el7_2.aarch64.rpm x86_64: grub2-debuginfo-2.02-0.33.el7_2.x86_64.rpm grub2-efi-modules-2.02-0.33.el7_2.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: grub2-2.02-0.33.el7_2.src.rpm x86_64: grub2-2.02-0.33.el7_2.x86_64.rpm grub2-debuginfo-2.02-0.33.el7_2.x86_64.rpm grub2-efi-2.02-0.33.el7_2.x86_64.rpm grub2-tools-2.02-0.33.el7_2.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: grub2-debuginfo-2.02-0.33.el7_2.x86_64.rpm grub2-efi-modules-2.02-0.33.el7_2.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-2015-8370 https://access.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2015 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFWb+3QXlSAg2UNWIIRArT8AJ0YmmVTVBR2q943FqGhNfwXM7PE7ACgvVS2 4g7c1tWUj/z0d5BWzr9aW3k= =iI+4 - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. 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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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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