Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU64272
Risk: Low
CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3981
CWE-ID:
CWE-277 - Insecure inherited permissions
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to incorrect default permissions for in grub.cfg file that are set by the application. A local user with access to the system can view contents of files and directories.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS SP1 - 20.03 LTS SP3
grub2-efi-ia32: before 2.04-23
grub2-tools-efi: before 2.04-23
grub2-efi-ia32-cdboot: before 2.04-23
grub2-efi-x64-cdboot: before 2.04-23
grub2-pc: before 2.04-23
grub2-efi-x64: before 2.04-23
grub2-efi-aa64-modules: before 2.04-23
grub2-pc-modules: before 2.04-23
grub2-efi-ia32-modules: before 2.04-23
grub2-common: before 2.04-23
grub2-help: before 2.04-23
grub2-efi-x64-modules: before 2.04-23
grub2-debuginfo: before 2.04-23
grub2-tools-extra: before 2.04-23
grub2-tools-minimal: before 2.04-23
grub2-efi-aa64: before 2.04-23
grub2-debugsource: before 2.04-23
grub2-tools: before 2.04-23
grub2-efi-aa64-cdboot: before 2.04-23
grub2: before 2.04-23
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1597
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.