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CVE-2024-32650— Rustls vulnerable to an infinite loop in rustls::conn::ConnectionCommon::complete_io() with proper client input

Quick assessment

Affected
rustls rustls
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rustls是Rustls开源的一个 Rust 中的现代 TLS 库。 Rustls 0.23.5、0.22.4 和 0.21.11之前版本存在安全漏洞，该漏洞源于当使用 blocking rustls 服务器时，如果客户端在 client_hello 之后立即发送 close_notify 消息，服务器的 complete_io 将陷入无限循环。

CVSS 7.5 · High EPSS 0.95% · P60

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2024-32650

Vulnerability Information
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Vulnerability Title
Rustls vulnerable to an infinite loop in rustls::conn::ConnectionCommon::complete_io() with proper client input
Source: CVE Program / CVE List V5
Vulnerability Description
Rustls is a modern TLS library written in Rust. `rustls::ConnectionCommon::complete_io` could fall into an infinite loop based on network input. When using a blocking rustls server, if a client send a `close_notify` message immediately after `client_hello`, the server's `complete_io` will get in an infinite loop. This vulnerability is fixed in 0.23.5, 0.22.4, and 0.21.11.
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
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
Vulnerability Title
Rustls 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rustls是Rustls开源的一个 Rust 中的现代 TLS 库。 Rustls 0.23.5、0.22.4 和 0.21.11之前版本存在安全漏洞，该漏洞源于当使用 blocking rustls 服务器时，如果客户端在 client_hello 之后立即发送 close_notify 消息，服务器的 complete_io 将陷入无限循环。
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
rustls rustls >= 0.23.0, < 0.23.5 -

II. Public POCs for CVE-2024-32650

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 10424 chars
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III. Intelligence Information for CVE-2024-32650

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Patches & Fixes for CVE-2024-32650 (3)

Vendor Advisories for CVE-2024-32650 (1)

IV. Related Vulnerabilities

Same vendor: rustls
Same weakness: CWE-835

V. Comments for CVE-2024-32650

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