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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2020-15707— GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.

Quick assessment

Affected
Ubuntu grub2 in Ubuntu
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GNU社区的一款Linux系统引导程序。 GRUB2 2.04及之前版本中的efilinux组件的‘grub_cmd_initrd’和‘grub_initrd_init’函数存在输入验证错误漏洞。攻击者可利用该漏洞执行任意代码并绕过UEFI安全启动限制。

CVSS 5.7 · Medium EPSS 1.59% · P75

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2020-15707

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.
Source: CVE Program / CVE List V5
Vulnerability Description
Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
grub2 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
grub2是GNU社区的一款Linux系统引导程序。 GRUB2 2.04及之前版本中的efilinux组件的‘grub_cmd_initrd’和‘grub_initrd_init’函数存在输入验证错误漏洞。攻击者可利用该漏洞执行任意代码并绕过UEFI安全启动限制。
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
Ubuntu grub2 in Ubuntu 20.04 LTS ~ 2.04-1ubuntu26.1 -

II. Public POCs for CVE-2020-15707

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2020-15707

请登录查看更多情报信息。

Vendor Advisories for CVE-2020-15707 (10)

Mailing List Discussions for CVE-2020-15707 (5)

Other References for CVE-2020-15707 (2)

Same Patch Batch · Ubuntu · 2020-07-29 · 3 CVEs total

CVE-2020-15705 6.4 MEDIUM GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot withou
CVE-2020-15706 6.4 MEDIUM GRUB2 contains a race condition leading to a use-after-free vulnerability which can be tri

IV. Related Vulnerabilities

Same product: grub2 in Ubuntu
Same vendor: Ubuntu
Same weakness: CWE-362

V. Comments for CVE-2020-15707

No comments yet

Leave a comment