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CVE-2022-41723— Denial of service via crafted HTTP/2 stream in net/http and golang.org/x/net

Quick assessment

Affected
Go standard library net/http
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google Golang是美国谷歌（Google）公司的一种静态强类型、编译型语言。Go的语法接近C语言，但对于变量的声明有所不同。Go支持垃圾回收功能。Go的并行模型是以东尼·霍尔的通信顺序进程（CSP）为基础，采取类似模型的其他语言包括Occam和Limbo，但它也具有Pi运算的特征，比如通道传输。在1.8版本中开放插件（Plugin）的支持，这意味着现在能从Go中动态加载部分函数。 Google Golang 存在安全漏洞，该漏洞源于HPACK解码器中CPU消耗过多，从而导致系统拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 4.56% · P91

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-41723

Vulnerability Information
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Vulnerability Title
Denial of service via crafted HTTP/2 stream in net/http and golang.org/x/net
Source: CVE Program / CVE List V5
Vulnerability Description
A maliciously crafted HTTP/2 stream could cause excessive CPU consumption in the HPACK decoder, sufficient to cause a denial of service from a small number of small requests.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Golang 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Golang是美国谷歌（Google）公司的一种静态强类型、编译型语言。Go的语法接近C语言，但对于变量的声明有所不同。Go支持垃圾回收功能。Go的并行模型是以东尼·霍尔的通信顺序进程（CSP）为基础，采取类似模型的其他语言包括Occam和Limbo，但它也具有Pi运算的特征，比如通道传输。在1.8版本中开放插件（Plugin）的支持，这意味着现在能从Go中动态加载部分函数。 Google Golang 存在安全漏洞，该漏洞源于HPACK解码器中CPU消耗过多，从而导致系统拒绝服务。
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
Go standard library net/http 0 ~ 1.19.6 -
golang.org/x/net golang.org/x/net/http2 0 ~ 0.7.0 -
golang.org/x/net golang.org/x/net/http2/hpack 0 ~ 0.7.0 -

II. Public POCs for CVE-2022-41723

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III. Intelligence Information for CVE-2022-41723

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Vendor Advisories for CVE-2022-41723 (1)

Mailing List Discussions for CVE-2022-41723 (5)

Other References for CVE-2022-41723 (5)

Same Patch Batch · Go standard library · 2023-02-28 · 4 CVEs total

CVE-2022-41722 Path traversal on Windows in path/filepath
CVE-2022-41724 Panic on large handshake records in crypto/tls
CVE-2022-41725 Excessive resource consumption in mime/multipart

IV. Related Vulnerabilities

Same product: net/http
Same vendor: Go standard library

V. Comments for CVE-2022-41723

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