CVE-2021-3418
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I. Basic Information for CVE-2021-3418
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. This flaw is a reintroduction of CVE-2020-15705 and only affects grub2 versions prior to 2.06 and upstream and distributions using the shim_lock mechanism.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
权限预留不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
grub2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
grub2是GNU社区的一款Linux系统引导程序。 GRUB2 存在安全漏洞，如果将签署 grub 的证书安装到 db 中，则可以直接启动 grub。然后它可以在没有签名验证的情况下启动任何内核。
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 | Fixed in 2.06 | - |
II. Public POCs for CVE-2021-3418
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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- https://bugzilla.redhat.com/show_bug.cgi?id=1933757x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-3418
Same Patch Batch · n/a · 2021-03-15 · 45 CVEs total
| CVE-2021-23355 | 5.6 MEDIUM | Arbitrary Command Injection |
| CVE-2021-23356 | 5.6 MEDIUM | Arbitrary Command Injection |
| CVE-2021-28378 | 3.7 LOW | Gitea 跨站脚本漏洞 |
| CVE-2021-23357 | 3.3 LOW | Directory Traversal |
| CVE-2021-26924 | Argo 跨站脚本漏洞 | |
| CVE-2021-27893 | SSH.COM SSH Tectia Client and Server 安全漏洞 | |
| CVE-2021-27891 | SSH.COM SSH Tectia Client and Server 安全漏洞 | |
| CVE-2021-27208 | Xilinx Zynq-7000 安全特征问题漏洞 | |
| CVE-2021-28379 | Vesta Control Panel 代码问题漏洞 | |
| CVE-2021-28374 | Debian courier-authlib 配置错误漏洞 | |
| CVE-2021-28375 | Linux kernel 安全漏洞 | |
| CVE-2021-28363 | urllib3 信任管理问题漏洞 | |
| CVE-2020-35358 | Domainmod 代码问题漏洞 | |
| CVE-2021-26923 | Argo 信息泄露漏洞 | |
| CVE-2021-27892 | SSH.COM SSH Tectia Client and Server 安全漏洞 | |
| CVE-2021-3167 | Cloudera Data Engineering 信息泄露漏洞 | |
| CVE-2021-27695 | Tecnoteca openMAINT 跨站脚本漏洞 | |
| CVE-2020-24877 | Depy zzzphp SQL注入漏洞 | |
| CVE-2021-27817 | ShopXO 代码问题漏洞 | |
| CVE-2021-27889 | MyBB 跨站脚本漏洞 |
Showing top 20 of 45 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: grub2
- CVE-2025-54770
Grub2: use-after-free in net_set_vlan - CVE-2025-61664
Grub2: missing unregister call for normal_exit command may l - CVE-2025-61663
Grub2: missing unregister call for normal commands may lead - CVE-2025-61662
Grub2: missing unregister call for gettext command may lead - CVE-2025-61661
Grub2: grub2: out-of-bounds write via malicious usb device
Same vendor: n/a
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Open5GS SMF ogs_nas_parse_qos_rules denial of service - CVE-2026-8269
Open5GS SMF smf_nsmf_handle_create_sm_context denial of serv - CVE-2026-8268
Open5GS SMF OpenAPI_list_create denial of service - CVE-2026-8267
Open5GS SMF smf_nsmf_handle_created_data_in_vsmf denial of s - CVE-2026-8266
Open5GS SMF gsm-build.c gsm_build_pdu_session_establishment_
Same weakness: CWE-281
- CVE-2026-35361
uutils coreutils mknod Security Label Inconsistency and Brok - CVE-2026-35351
uutils coreutils mv Silent Ownership Loss in Cross-Device Op - CVE-2026-35350
uutils coreutils cp Unexpected Privileged Executable Creatio - CVE-2026-35385
OpenSSH 安全漏洞 - CVE-2025-9615
Networkmanager: networkmanager file access
V. Comments for CVE-2021-3418
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