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CVE-2022-39294— (DoS) Denial of Service from unchecked request length in conduit-hyper

Quick assessment

Affected
conduit-rust conduit-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.

conduit-hyper是conduit-rust开源的一个库。用于将导管应用程序与超级服务器集成。 conduit-hyper 0.4.2之前的版本存在安全漏洞，该漏洞源于其调用hyper::body::to_bytes之前不检查请求的长度导致攻击者可以发送过长的恶意请求导致内存分配失败。

CVSS 7.5 · High EPSS 0.73% · P52

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-39294

Vulnerability Information
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Vulnerability Title
(DoS) Denial of Service from unchecked request length in conduit-hyper
Source: CVE Program / CVE List V5
Vulnerability Description
conduit-hyper integrates a conduit application with the hyper server. Prior to version 0.4.2, `conduit-hyper` did not check any limit on a request's length before calling [`hyper::body::to_bytes`](https://docs.rs/hyper/latest/hyper/body/fn.to_bytes.html). An attacker could send a malicious request with an abnormally large `Content-Length`, which could lead to a panic if memory allocation failed for that request. In version 0.4.2, `conduit-hyper` sets an internal limit of 128 MiB per request, otherwise returning status 400 ("Bad Request"). This crate is part of the implementation of Rust's [crates.io](https://crates.io/), but that service is not affected due to its existing cloud infrastructure, which already drops such malicious requests. Even with the new limit in place, `conduit-hyper` is not recommended for production use, nor to directly serve the public Internet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
conduit-hyper 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
conduit-hyper是conduit-rust开源的一个库。用于将导管应用程序与超级服务器集成。 conduit-hyper 0.4.2之前的版本存在安全漏洞，该漏洞源于其调用hyper::body::to_bytes之前不检查请求的长度导致攻击者可以发送过长的恶意请求导致内存分配失败。
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
conduit-rust conduit-hyper >= 0.2.0-alpha.3, < 0.4.2 -

II. Public POCs for CVE-2022-39294

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III. Intelligence Information for CVE-2022-39294

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Vendor Advisories for CVE-2022-39294 (1)

IV. Related Vulnerabilities

Same weakness: CWE-400

V. Comments for CVE-2022-39294

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