openEuler update for grub2

Published: 2022-11-25

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-2601 CVE-2022-3775
CWE-ID	CWE-787
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	openEuler Operating systems & Components / Operating system grub2-tools-efi Operating systems & Components / Operating system package or component grub2-efi-ia32 Operating systems & Components / Operating system package or component grub2-efi-x64-cdboot Operating systems & Components / Operating system package or component grub2-pc Operating systems & Components / Operating system package or component grub2-efi-ia32-cdboot Operating systems & Components / Operating system package or component grub2-efi-x64 Operating systems & Components / Operating system package or component grub2-efi-x64-modules Operating systems & Components / Operating system package or component grub2-efi-ia32-modules Operating systems & Components / Operating system package or component grub2-pc-modules Operating systems & Components / Operating system package or component grub2-efi-aa64-modules Operating systems & Components / Operating system package or component grub2-help Operating systems & Components / Operating system package or component grub2-common Operating systems & Components / Operating system package or component grub2-efi-aa64-cdboot Operating systems & Components / Operating system package or component grub2-tools-extra Operating systems & Components / Operating system package or component grub2-debuginfo Operating systems & Components / Operating system package or component grub2-tools Operating systems & Components / Operating system package or component grub2-efi-aa64 Operating systems & Components / Operating system package or component grub2-tools-minimal Operating systems & Components / Operating system package or component grub2-debugsource Operating systems & Components / Operating system package or component grub2 Operating systems & Components / Operating system package or component
Vendor	openEuler

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU69394

Risk: Low

CVSSv4.0: 4 [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/E:U/U:Clear]

CVE-ID: CVE-2022-2601

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows an attacker to bypass implemented security restrictions.

The vulnerability exists due to a boundary error within the grub_font_construct_glyph() function when handling pf2 font. An attacker with physical access to the affected system can trigger an out-of-bounds write and bypass secure boot restrictions.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

grub2-tools-efi: before 2.04-26

grub2-efi-ia32: before 2.04-26

grub2-efi-x64-cdboot: before 2.04-26

grub2-pc: before 2.04-26

grub2-efi-ia32-cdboot: before 2.04-26

grub2-efi-x64: before 2.04-26

grub2-efi-x64-modules: before 2.04-26

grub2-efi-ia32-modules: before 2.04-26

grub2-pc-modules: before 2.04-26

grub2-efi-aa64-modules: before 2.04-26

grub2-help: before 2.04-26

grub2-common: before 2.04-26

grub2-efi-aa64-cdboot: before 2.04-26

grub2-tools-extra: before 2.04-26

grub2-debuginfo: before 2.04-26

grub2-tools: before 2.04-26

grub2-efi-aa64: before 2.04-26

grub2-tools-minimal: before 2.04-26

grub2-debugsource: before 2.04-26

grub2: before 2.04-26

CPE2.3

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-2118

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.

2) Out-of-bounds write

EUVDB-ID: #VU69395