Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
EUVDB-ID: #VU81627
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-4692
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a local user to bypass secure boot protection.
The vulnerability exists due to a boundary error in NTFS driver implementation in grub-core/fs/ntfs.c when parsing the $ATTRIBUTE_LIST attribute for the $MFT file. A local user can pass a specially crafted image to the application, trigger an out-of-bounds write and bypass secure boot protection.
MitigationUpdate the affected package grub2 to the latest version.
Vulnerable software versionsSUSE Manager Proxy Module: 4.2
SUSE Linux Enterprise Micro for Rancher: 5.2
SUSE Linux Enterprise Server for SAP Applications 15: SP3
SUSE Linux Enterprise Server 15 SP3 LTSS: 15-SP3
SUSE Linux Enterprise Server 15: SP3
SUSE Linux Enterprise High Performance Computing LTSS 15: SP3
SUSE Linux Enterprise High Performance Computing ESPOS 15: SP3
SUSE Linux Enterprise High Performance Computing 15: SP3
SUSE Enterprise Storage: 7.1
SUSE Manager Retail Branch Server: 4.2
SUSE Linux Enterprise Micro: 5.2
SUSE Manager Server: 4.2
SUSE Manager Proxy: 4.2
grub2-s390x-emu: before 2.04-150300.22.43.1
grub2-snapper-plugin: before 2.04-150300.22.43.1
grub2-systemd-sleep-plugin: before 2.04-150300.22.43.1
grub2-x86_64-efi: before 2.04-150300.22.43.1
grub2-i386-pc: before 2.04-150300.22.43.1
grub2-powerpc-ieee1275: before 2.04-150300.22.43.1
grub2-x86_64-xen: before 2.04-150300.22.43.1
grub2-debuginfo: before 2.04-150300.22.43.1
grub2: before 2.04-150300.22.43.1
grub2-debugsource: before 2.04-150300.22.43.1
grub2-arm64-efi: before 2.04-150300.22.43.1
CPE2.3http://www.suse.com/support/update/announcement/2023/suse-su-20234130-1/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU81628
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-4693
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows an attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the NTFS driver in grub-core/fs/ntfs.c when reading data from the resident $DATA attribute. A attacker with physical access to the system use a specially crafted NTFS file system image to read arbitrary memory locations, such as data cached in memory or EFI variables values.
Update the affected package grub2 to the latest version.
Vulnerable software versionsSUSE Manager Proxy Module: 4.2
SUSE Linux Enterprise Micro for Rancher: 5.2
SUSE Linux Enterprise Server for SAP Applications 15: SP3
SUSE Linux Enterprise Server 15 SP3 LTSS: 15-SP3
SUSE Linux Enterprise Server 15: SP3
SUSE Linux Enterprise High Performance Computing LTSS 15: SP3
SUSE Linux Enterprise High Performance Computing ESPOS 15: SP3
SUSE Linux Enterprise High Performance Computing 15: SP3
SUSE Enterprise Storage: 7.1
SUSE Manager Retail Branch Server: 4.2
SUSE Linux Enterprise Micro: 5.2
SUSE Manager Server: 4.2
SUSE Manager Proxy: 4.2
grub2-s390x-emu: before 2.04-150300.22.43.1
grub2-snapper-plugin: before 2.04-150300.22.43.1
grub2-systemd-sleep-plugin: before 2.04-150300.22.43.1
grub2-x86_64-efi: before 2.04-150300.22.43.1
grub2-i386-pc: before 2.04-150300.22.43.1
grub2-powerpc-ieee1275: before 2.04-150300.22.43.1
grub2-x86_64-xen: before 2.04-150300.22.43.1
grub2-debuginfo: before 2.04-150300.22.43.1
grub2: before 2.04-150300.22.43.1
grub2-debugsource: before 2.04-150300.22.43.1
grub2-arm64-efi: before 2.04-150300.22.43.1
CPE2.3http://www.suse.com/support/update/announcement/2023/suse-su-20234130-1/
Q & A
Can this vulnerability be exploited remotely?
No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.