Observable discrepancy in grub - CVE-2024-56738

Vulnerability identifier: #VU112027

CSH Severity: Low

CVSS v4: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-56738

CWE-ID: CWE-203

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows an attacker to bypass implemented security restrictions.

The vulnerability exists due to software does not use a constant-time algorithm for grub_crypto_memcmp. An attacker with physical access to the system can perform side-channel attacks to bypass implemented security restrictions and escalate privileges on the system. 

grub
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Basesystem Module
Server Applications Module
openSUSE Leap
openEuler
Anolis OS
grub2-x86_64-xen
grub2-snapper-plugin
grub2-systemd-sleep-plugin
grub2-debuginfo
grub2
grub2-i386-pc
grub2-debugsource
grub2-x86_64-efi
grub2-arm64-efi
grub2-s390x-emu
grub2-i386-efi
grub2-powerpc-ieee1275-extras
grub2-i386-efi-extras
grub2-arm64-efi-debug
grub2-i386-pc-extras
grub2-powerpc-ieee1275
grub2-i386-xen-extras
grub2-x86_64-efi-extras
grub2-x86_64-efi-debug
grub2-s390x-emu-debug
grub2-i386-efi-debug
grub2-branding-upstream
grub2-powerpc-ieee1275-debug
grub2-i386-pc-debug
grub2-arm64-efi-extras
grub2-x86_64-xen-extras
grub2-i386-xen
grub2-s390x-emu-extras
grub2-x86_64-xen-debug
grub2-i386-xen-debug
grub2-efi-ia32
grub2-emu
grub2-efi-x64-cdboot
grub2-efi-x64
grub2-efi-ia32-cdboot
grub2-efi-riscv64-cdboot
grub2-doc
grub2-efi-riscv64
grub2-efi-loongarch64-cdboot
grub2-efi-loongarch64
grub2-pc-modules
grub2-efi-x64-modules
grub2-efi-riscv64-modules
grub2-efi-loongarch64-modules
grub2-efi-ia32-modules
grub2-efi-aa64-modules
grub2-emu-modules
grub2-common
grub2-efi-aa64-cdboot
grub2-efi-aa64
grub2-tools-minimal
grub2-tools-extra
grub2-tools-efi
grub2-tools
grub2-pc
grub2-help

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

grub2-x86_64-xen - addressed in versions 2.02-190.1, 2.04-150300.3.14.2, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-snapper-plugin - addressed in versions 2.02-190.1, 2.04-150300.3.14.2, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-systemd-sleep-plugin - addressed in versions 2.02-190.1, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-debuginfo - addressed in versions 2.02-190.1, 2.04-150300.3.14.2, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2 - addressed in versions 2.02-190.1, 2.04-150300.3.14.2, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-i386-pc - addressed in versions 2.02-190.1, 2.04-150300.3.14.2, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-debugsource - addressed in versions 2.02-190.1, 2.04-150300.3.14.2, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-x86_64-efi - addressed in versions 2.02-190.1, 2.04-150300.3.14.2, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-arm64-efi - addressed in versions 2.04-150300.3.14.2, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-s390x-emu - addressed in versions 2.04-150300.3.14.2, 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-i386-efi - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-powerpc-ieee1275-extras - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-i386-efi-extras - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-arm64-efi-debug - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-i386-pc-extras - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-powerpc-ieee1275 - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1, 2.12-150700.19.13.2
grub2-i386-xen-extras - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-x86_64-efi-extras - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-x86_64-efi-debug - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-s390x-emu-debug - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-i386-efi-debug - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-branding-upstream - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-powerpc-ieee1275-debug - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-i386-pc-debug - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-arm64-efi-extras - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-x86_64-xen-extras - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-i386-xen - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-s390x-emu-extras - addressed in versions 2.04-150300.22.58.1, 2.06-150400.11.63.1, 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-x86_64-xen-debug - addressed in versions 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-i386-xen-debug - addressed in versions 2.06-150500.29.53.1, 2.12-150600.8.34.1
grub2-efi-ia32 - update to 2.12-15
grub2-emu - update to 2.12-15
grub2-efi-x64-cdboot - update to 2.12-15
grub2-efi-x64 - update to 2.12-15
grub2-efi-ia32-cdboot - update to 2.12-15
grub2-efi-riscv64-cdboot - update to 2.12-15
grub2-doc - update to 2.12-15
grub2-efi-riscv64 - update to 2.12-15
grub2-efi-loongarch64-cdboot - update to 2.12-15
grub2-efi-loongarch64 - update to 2.12-15
grub2-pc-modules - update to 2.12-15
grub2-efi-x64-modules - update to 2.12-15
grub2-efi-riscv64-modules - update to 2.12-15
grub2-efi-loongarch64-modules - update to 2.12-15
grub2-efi-ia32-modules - update to 2.12-15
grub2-efi-aa64-modules - update to 2.12-15
grub2-emu-modules - update to 2.12-15
grub2-common - update to 2.12-15
grub2-efi-aa64-cdboot - update to 2.12-15
grub2-efi-aa64 - update to 2.12-15
grub2-tools-minimal - update to 2.12-15
grub2-tools-extra - update to 2.12-15
grub2-tools-efi - update to 2.12-15
grub2-tools - update to 2.12-15
grub2-pc - update to 2.12-15
grub2 - update to 2.12-41
grub2-tools-efi - update to 2.12-41
grub2-pc - update to 2.12-41
grub2-efi-x64-cdboot - update to 2.12-41
grub2-efi-x64 - update to 2.12-41
grub2-efi-ia32-cdboot - update to 2.12-41
grub2-efi-ia32 - update to 2.12-41
grub2-pc-modules - update to 2.12-41
grub2-help - update to 2.12-41
grub2-efi-x64-modules - update to 2.12-41
grub2-efi-ia32-modules - update to 2.12-41
grub2-efi-aa64-modules - update to 2.12-41
grub2-common - update to 2.12-41
grub2-tools-minimal - update to 2.12-41
grub2-tools-extra - update to 2.12-41
grub2-tools - update to 2.12-41
grub2-efi-aa64-cdboot - update to 2.12-41
grub2-efi-aa64 - update to 2.12-41
grub2-debugsource - update to 2.12-41
grub2-debuginfo - update to 2.12-41

• https://savannah.gnu.org/bugs/?66603

• Security restrictions bypass in GNU GRUB
• openEuler update for grub2
• SUSE update for grub2
• SUSE update for grub2
• SUSE update for grub2
• SUSE update for grub2
• SUSE update for grub2
• SUSE update for Recommended update for grub2
• SUSE update for Recommended update for grub2
• SUSE update for Recommended update for grub2
• Anolis OS update for grub2