Detections
Analytics
Oracle Linux 9 : grub2 (ELSA-2024-2456)
high Nessus Plugin ID 195073
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Synopsis
The remote Oracle Linux host is missing one or more security updates.Description
The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-2456 advisory.- 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. (CVE-2023-4693)
- A flaw was found in the grub2-set-bootflag utility of grub2. After the fix of CVE-2019-14865, grub2-set- bootflag will create a temporary file with the new grubenv content and rename it to the original grubenv file. If the program is killed before the rename operation, the temporary file will not be removed and may fill the filesystem when invoked multiple times, resulting in a filesystem out of free inodes or blocks.
(CVE-2024-1048)
- 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. (CVE-2023-4692)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
Plugin Details
Severity: High
ID: 195073
File Name: oraclelinux_ELSA-2024-2456.nasl
Version: 1.0
Type: local
Agent: unix
Published: 5/6/2024
Updated: 5/6/2024
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.3
Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C
CVSS Score Source: CVE-2023-4692
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:oracle:linux:grub2-pc, cpe:/o:oracle:linux:9, p-cpe:/a:oracle:linux:grub2-efi-aa64, p-cpe:/a:oracle:linux:grub2-tools, p-cpe:/a:oracle:linux:grub2-tools-efi, cpe:/o:oracle:linux:9::baseos_latest, p-cpe:/a:oracle:linux:grub2-efi-x64-modules, p-cpe:/a:oracle:linux:grub2-tools-minimal, p-cpe:/a:oracle:linux:grub2-common, p-cpe:/a:oracle:linux:grub2-efi-x64, p-cpe:/a:oracle:linux:grub2-efi-aa64-cdboot, p-cpe:/a:oracle:linux:grub2-pc-modules, cpe:/o:oracle:linux:9:4:baseos_base, p-cpe:/a:oracle:linux:grub2-efi-aa64-modules, p-cpe:/a:oracle:linux:grub2-efi-x64-cdboot, p-cpe:/a:oracle:linux:grub2-tools-extra
Required KB Items: Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list, Host/local_checks_enabled
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 5/3/2024
Vulnerability Publication Date: 10/25/2023