CVE-2021-22556— Integer Overflow in Fuchsia Kernel
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数溢出或超界折返
Source: NVD (National Vulnerability Database)
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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- https://fuchsia-review.googlesource.com/c/fuchsia/+/570881x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-22556
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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