The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_2456.json

Red 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




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Red Hat Security Advisory

Synopsis:           Moderate: grub2 security update
Advisory ID:        RHSA-2024:2456-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:2456
Issue date:         2024-04-30
Revision:           03
CVE Names:          CVE-2023-4692
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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/11258



CVEs:

CVE-2023-4692

References:

https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.4_release_notes/index
https://bugzilla.redhat.com/show_bug.cgi?id=2236613
https://bugzilla.redhat.com/show_bug.cgi?id=2238343
https://bugzilla.redhat.com/show_bug.cgi?id=2256827
https://issues.redhat.com/browse/RHEL-1601
https://issues.redhat.com/browse/RHEL-21368
https://issues.redhat.com/browse/RHEL-26322