Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2023-4001— Grub2: bypass the grub password protection feature

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 9
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

grub2是美国GNU社区的一款Linux系统引导程序。 grub2 存在安全漏洞，该漏洞源于GRUB 使用设备的 UUID 来搜索包含 GRUB 密码保护功能的密码哈希的配置文件，导致身份验证绕过缺陷，攻击者利用该漏洞可以绕过 UEFI 系统上的 GRUB 密码保护功能。

CVSS 6.8 · Medium EPSS 0.54% · P43

Possible ATT&CK Techniques 1 AI

T1508
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2023-4001

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Grub2: bypass the grub password protection feature
Source: CVE Program / CVE List V5
Vulnerability Description
An authentication bypass flaw was found in GRUB due to the way that GRUB uses the UUID of a device to search for the configuration file that contains the password hash for the GRUB password protection feature. An attacker capable of attaching an external drive such as a USB stick containing a file system with a duplicate UUID (the same as in the "/boot/" file system) can bypass the GRUB password protection feature on UEFI systems, which enumerate removable drives before non-removable ones. This issue was introduced in a downstream patch in Red Hat's version of grub2 and does not affect the upstream package.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
grub2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
grub2是美国GNU社区的一款Linux系统引导程序。 grub2 存在安全漏洞，该漏洞源于GRUB 使用设备的 UUID 来搜索包含 GRUB 密码保护功能的密码哈希的配置文件，导致身份验证绕过缺陷，攻击者利用该漏洞可以绕过 UEFI 系统上的 GRUB 密码保护功能。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 9 1:2.06-70.el9_3.2 ~ * cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 1:2.06-27.el9_0.16 ~ * cpe:/o:redhat:rhel_eus:9.0::baseos
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 1:2.06-61.el9_2.2 ~ * cpe:/o:redhat:rhel_eus:9.2::baseos
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8

II. Public POCs for CVE-2023-4001

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2023-4001

请登录查看更多情报信息。

Vendor Advisories for CVE-2023-4001 (6)

Mailing List Discussions for CVE-2023-4001 (2)

Other References for CVE-2023-4001 (1)

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 9
Same vendor: Red Hat
Same weakness: CWE-290

V. Comments for CVE-2023-4001

No comments yet

Leave a comment