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CVE-2024-53271— HTTP/1.1 multiple issues with envoy.reloadable_features.http1_balsa_delay_reset in envoy

Quick assessment

Affected
envoyproxy envoy
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.

Envoy Proxy是Envoy Proxy开源的一个云原生高性能边缘/中间/服务代理。 Envoy Proxy存在安全漏洞，该漏洞源于无法正确处理http响应，可能导致联网设备中的下游故障。

CVSS 7.1 · High EPSS 0.62% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-53271

Vulnerability Information
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Vulnerability Title
HTTP/1.1 multiple issues with envoy.reloadable_features.http1_balsa_delay_reset in envoy
Source: CVE Program / CVE List V5
Vulnerability Description
Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions envoy does not properly handle http 1.1 non-101 1xx responses. This can lead to downstream failures in networked devices. This issue has been addressed in versions 1.31.5 and 1.32.3. Users are advised to upgrade. There are no known workarounds for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
控制流实现总是不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Envoy Proxy 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy Proxy是Envoy Proxy开源的一个云原生高性能边缘/中间/服务代理。 Envoy Proxy存在安全漏洞，该漏洞源于无法正确处理http响应，可能导致联网设备中的下游故障。
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
envoyproxy envoy >= 1.31.0, < 1.31.5 -

II. Public POCs for CVE-2024-53271

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III. Intelligence Information for CVE-2024-53271

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Patches & Fixes for CVE-2024-53271 (1)

Vendor Advisories for CVE-2024-53271 (1)

Same Patch Batch · envoyproxy · 2024-12-18 · 3 CVEs total

CVE-2024-53270 7.5 HIGH HTTP/1: sending overload crashes when the request is reset beforehand in envoy
CVE-2024-53269 4.5 MEDIUM Happy Eyeballs: Validate that additional_address are IP addresses instead of crashing when

IV. Related Vulnerabilities

Same product: envoy
Same vendor: envoyproxy
Same weakness: CWE-670

V. Comments for CVE-2024-53271

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