Red Hat Enterprise Linux 7 update for grub2

1) Out-of-bounds write

EUVDB-ID: #VU69394

Risk: Low

CVSSv3.1: 6.6 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

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 website.

Vulnerable software versions

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux for Power, big endian: 7

Red Hat Enterprise Linux for Scientific Computing: 7

Red Hat Enterprise Linux Desktop: 7

Red Hat Enterprise Linux Workstation: 7

Red Hat Enterprise Linux Server: 7

grub2 (Red Hat package): before 2.02-0.87.el7_9.14

External links

http://access.redhat.com/errata/RHSA-2024:2002

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.