Headline
Red Hat Security Advisory 2024-2456-03
Red Hat Security Advisory 2024-2456-03 - An update for grub2 is now available for Red Hat Enterprise Linux 9. Issues addressed include code execution, out of bounds read, and out of bounds write vulnerabilities.
The following advisory data is extracted from:https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_2456.jsonRed Hat officially shut down their mailing list notifications October 10, 2023. Due to this, Packet Storm has recreated the below data as a reference point to raise awareness. It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis: Moderate: grub2 security updateAdvisory ID: RHSA-2024:2456-03Product: Red Hat Enterprise LinuxAdvisory URL: https://access.redhat.com/errata/RHSA-2024:2456Issue date: 2024-04-30Revision: 03CVE Names: CVE-2023-4692====================================================================Summary: An update for grub2 is now available for Red Hat Enterprise Linux 9.Red Hat Product Security has rated this update as having a security impact of Moderate. 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.Description:The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.Security Fix(es):* grub2: grub2-set-bootflag can be abused by local (pseudo-)users (CVE-2024-1048)* grub2: Out-of-bounds write at fs/ntfs.c may lead to unsigned code execution (CVE-2023-4692)* grub2: out-of-bounds read at fs/ntfs.c (CVE-2023-4693)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.Additional Changes:For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.4 Release Notes linked from the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-4692References:https://access.redhat.com/security/updates/classification/#moderatehttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.4_release_notes/indexhttps://bugzilla.redhat.com/show_bug.cgi?id=2236613https://bugzilla.redhat.com/show_bug.cgi?id=2238343https://bugzilla.redhat.com/show_bug.cgi?id=2256827https://issues.redhat.com/browse/RHEL-1601https://issues.redhat.com/browse/RHEL-21368https://issues.redhat.com/browse/RHEL-26322Related news
Dell vApp Manger, versions prior to 9.2.4.x contain an arbitrary file read vulnerability. A remote attacker could potentially exploit this vulnerability to read arbitrary files from the target system.
Dell vApp Manger, versions prior to 9.2.4.x contain an arbitrary file read vulnerability. A remote attacker could potentially exploit this vulnerability to read arbitrary files from the target system.
Gentoo Linux Security Advisory 202311-14 - Multiple vulnerabilities have been discovered in GRUB, which may lead to secure boot circumvention or code execution. Versions greater than or equal to 2.06-r9 are affected.
Gentoo Linux Security Advisory 202311-14 - Multiple vulnerabilities have been discovered in GRUB, which may lead to secure boot circumvention or code execution. Versions greater than or equal to 2.06-r9 are affected.
An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk.
An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved.
Debian Linux Security Advisory 5519-1 - Maxim Suhanov discovered multiple vulnerabilities in GURB2's code to handle NTFS filesystems, which may result in a Secure Boot bypass.
Debian Linux Security Advisory 5519-1 - Maxim Suhanov discovered multiple vulnerabilities in GURB2's code to handle NTFS filesystems, which may result in a Secure Boot bypass.
Ubuntu Security Notice 6410-1 - It was discovered that a specially crafted file system image could cause a heap-based out-of-bounds write. A local attacker could potentially use this to perform arbitrary code execution bypass and bypass secure boot protections. It was discovered that a specially crafted file system image could cause an out-of-bounds read. A physically-present attacker could possibly use this to leak sensitive information to the GRUB pager.
Ubuntu Security Notice 6410-1 - It was discovered that a specially crafted file system image could cause a heap-based out-of-bounds write. A local attacker could potentially use this to perform arbitrary code execution bypass and bypass secure boot protections. It was discovered that a specially crafted file system image could cause an out-of-bounds read. A physically-present attacker could possibly use this to leak sensitive information to the GRUB pager.