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CVE-2024-23327— Crash in proxy protocol when command type of LOCAL 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是一款开源的分布式代理服务器。 Envoy 1.29.1之前版本存在代码问题漏洞，该漏洞源于当命令类型为LOCAL时会发生拒绝服务。

CVSS 7.5 · High EPSS 0.69% · P51

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2024-23327

Vulnerability Information
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Vulnerability Title
Crash in proxy protocol when command type of LOCAL in Envoy
Source: CVE Program / CVE List V5
Vulnerability Description
Envoy is a high-performance edge/middle/service proxy. When PPv2 is enabled both on a listener and subsequent cluster, the Envoy instance will segfault when attempting to craft the upstream PPv2 header. This occurs when the downstream request has a command type of LOCAL and does not have the protocol block. This issue has been addressed in releases 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.
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
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Envoy 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy是一款开源的分布式代理服务器。 Envoy 1.29.1之前版本存在代码问题漏洞，该漏洞源于当命令类型为LOCAL时会发生拒绝服务。
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
envoyproxy envoy >= 1.29.0, < 1.29.1 -

II. Public POCs for CVE-2024-23327

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III. Intelligence Information for CVE-2024-23327

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Patches & Fixes for CVE-2024-23327 (1)

Vendor Advisories for CVE-2024-23327 (1)

Same Patch Batch · envoyproxy · 2024-02-09 · 5 CVEs total

CVE-2024-23324 8.6 HIGH Envoy ext auth can be bypassed when Proxy protocol filter sets invalid UTF-8 metadata
CVE-2024-23322 7.5 HIGH Envoy crashes when idle and request per try timeout occur within the backoff interval
CVE-2024-23325 7.5 HIGH Envoy crashes when using an address type that isn’t supported by the OS
CVE-2024-23323 4.3 MEDIUM Excessive CPU usage when URI template matcher is configured using regex in Envoy

IV. Related Vulnerabilities

Same product: envoy
Same vendor: envoyproxy
Same weakness: CWE-476

V. Comments for CVE-2024-23327

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