CVE-2021-22556— Integer Overflow in Fuchsia Kernel
Quick assessment
Affected
Google LLC Fuchsia Kernel
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，该漏洞源于存在一个整数溢出漏洞。攻击者可以在他们不拥有的页面上发出内存缓存失效操作，从而允许他们从用户空间控制内核内存。
Possible ATT&CK Techniques 3 AI
T1053 · Scheduled Task/Job T1055 · Process Injection T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-22556
Vulnerability Information
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Vulnerability Title
Integer Overflow in Fuchsia Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don’t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Fuchsia 输入验证错误漏洞
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，该漏洞源于存在一个整数溢出漏洞。攻击者可以在他们不拥有的页面上发出内存缓存失效操作，从而允许他们从用户空间控制内核内存。
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 Kernel | unspecified ~ 4.1 | - |
|
II. Public POCs for CVE-2021-22556
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-22556 (1)
-
https://fuchsia-review.googlesource.com/c/fuchsia/+/570881 x_refsource_MISC
Same Patch Batch · Google LLC · 2022-05-03 · 3 CVEs total
| CVE-2021-22573 | 8.7 HIGH | Incorrect signature verification on Google-oauth-java-client |
| CVE-2022-0882 | 5.3 MEDIUM | Illegal access to Kernel log in Fuchsia |
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V. Comments for CVE-2021-22556
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