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CVE-2021-32714— Integer Overflow in Chunked Transfer-Encoding

Quick assessment

Affected
hyperium hyper
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.

hyperium hyper是开源的Rust 的 HTTP 库。旨在成为库和应用程序的构建块。 hyperium hyper存在输入验证错误漏洞，该漏洞源于hyper 0.14.10版本及之前版本中，hyper 的 HTTP 服务器和客户端代码存在当解码太大的块大小时可能会触发整数溢出。

CVSS 5.9 · Medium EPSS 1.16% · P66

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-32714

Vulnerability Information
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Vulnerability Title
Integer Overflow in Chunked Transfer-Encoding
Source: CVE Program / CVE List V5
Vulnerability Description
hyper is an HTTP library for Rust. In versions prior to 0.14.10, hyper's HTTP server and client code had a flaw that could trigger an integer overflow when decoding chunk sizes that are too big. This allows possible data loss, or if combined with an upstream HTTP proxy that allows chunk sizes larger than hyper does, can result in "request smuggling" or "desync attacks." The vulnerability is patched in version 0.14.10. Two possible workarounds exist. One may reject requests manually that contain a `Transfer-Encoding` header or ensure any upstream proxy rejects `Transfer-Encoding` chunk sizes greater than what fits in 64-bit unsigned integers.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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
hyperium hyper 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
hyperium hyper是开源的Rust 的 HTTP 库。旨在成为库和应用程序的构建块。 hyperium hyper存在输入验证错误漏洞，该漏洞源于hyper 0.14.10版本及之前版本中，hyper 的 HTTP 服务器和客户端代码存在当解码太大的块大小时可能会触发整数溢出。
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
hyperium hyper < 0.14.10 -

II. Public POCs for CVE-2021-32714

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III. Intelligence Information for CVE-2021-32714

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Vendor Advisories for CVE-2021-32714 (1)

IV. Related Vulnerabilities

Same product: hyper
Same vendor: hyperium
Same weakness: CWE-190

V. Comments for CVE-2021-32714

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