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CVE-2020-27779

Quick assessment

Affected
n/a grub2
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，发现cutmem命令允许特权用户启用安全启动后删除内存区域。以下产品和版本受到影响：grub2 in versions prior to 2.06。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.39% · P31
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I. Basic Information for CVE-2020-27779

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
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，发现cutmem命令允许特权用户启用安全启动后删除内存区域。以下产品和版本受到影响：grub2 in versions prior to 2.06。
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
- grub2 grub 2.06 -

II. Public POCs for CVE-2020-27779

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III. Intelligence Information for CVE-2020-27779

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Vendor Advisories for CVE-2020-27779 (3)

Mailing List Discussions for CVE-2020-27779 (1)

Same Patch Batch · n/a · 2021-03-03 · 36 CVEs total

CVE-2021-23347 4.7 MEDIUM Cross-site Scripting (XSS)
CVE-2020-28597 Epignosis EfrontPro 安全漏洞
CVE-2020-25632 grub2 资源管理错误漏洞
CVE-2021-20225 grub2 缓冲区错误漏洞
CVE-2021-20233 grub2 缓冲区错误漏洞
CVE-2020-29047 WordPress 代码问题漏洞
CVE-2021-22877 Nextcloud 访问控制错误漏洞
CVE-2021-22878 Nextcloud Server 跨站脚本漏洞
CVE-2020-8296 Nextcloud 安全漏洞
CVE-2021-21978 VMware View Planner 代码问题漏洞
CVE-2020-14372 grub2 安全漏洞
CVE-2020-28591 Slic3r 缓冲区错误漏洞
CVE-2020-13558 WebKitGTK 资源管理错误漏洞
CVE-2021-22681 Rockwell Automation RSLogix 500 和 Logix Designer Studio 5000 安全漏洞
CVE-2021-27839 Online Invoicing System 注入漏洞
CVE-2021-27935 AdGuard 安全漏洞
CVE-2021-27931 LumisXP 代码问题漏洞
CVE-2021-27940 openark orchestrator 跨站脚本漏洞
CVE-2021-22666 FATEK FvDesigner 缓冲区错误漏洞
CVE-2021-27923 Pillow 输入验证错误漏洞

Showing top 20 of 36 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: grub2
Same vendor: n/a
Same weakness: CWE-285

V. Comments for CVE-2020-27779

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