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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-22566— Incorrect mapping of Executable bits in Fuchsia Kernel

Quick assessment

Affected
Google LLC Fuchsia
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.

Fuchsia是一个开源的通用操作系统。 fuchsia 存在安全漏洞，攻击者可以利用该漏洞从用户模式绕过内核模式页面的可执行性限制。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1620 · Reflective Code Loading
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-22566

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Incorrect mapping of Executable bits in Fuchsia Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
An incorrect setting of UXN bits within mmu_flags_to_s1_pte_attr lead to privileged executable pages being mapped as executable from an unprivileged context. This can be leveraged by an attacker to bypass executability restrictions of kernel-mode pages from user-mode. An incorrect setting of PXN bits within mmu_flags_to_s1_pte_attr lead to unprivileged executable pages being mapped as executable from a privileged context. This can be leveraged by an attacker to bypass executability restrictions of user-mode pages from kernel-mode. Typically this allows a potential attacker to circumvent a mitigation, making exploitation of potential kernel-mode vulnerabilities easier. We recommend updating kernel beyond commit 7d731b4e9599088ac3073956933559da7bca6a00 and rebuilding.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
Permission Issues
Source: CVE Program / CVE List V5
Vulnerability Title
Fuchsia 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fuchsia是一个开源的通用操作系统。 fuchsia 存在安全漏洞，攻击者可以利用该漏洞从用户模式绕过内核模式页面的可执行性限制。
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
Google LLC Fuchsia 0 ~ 7d731b4e9599088ac3073956933559da7bca6a00 -

II. Public POCs for CVE-2021-22566

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-22566

请登录查看更多情报信息。

Other References for CVE-2021-22566 (1)

IV. Related Vulnerabilities

Same product: Fuchsia
Same vendor: Google LLC
Same weakness: CWE-275

V. Comments for CVE-2021-22566

No comments yet

Leave a comment