CVE-2024-23324— Envoy ext auth can be bypassed when Proxy protocol filter sets invalid UTF-8 metadata
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I. Basic Information for CVE-2024-23324
Vulnerability Information
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Vulnerability Title
Envoy ext auth can be bypassed when Proxy protocol filter sets invalid UTF-8 metadata
Source: NVD (National Vulnerability Database)
Vulnerability Description
Envoy is a high-performance edge/middle/service proxy. External authentication can be bypassed by downstream connections. Downstream clients can force invalid gRPC requests to be sent to ext_authz, circumventing ext_authz checks when failure_mode_allow is set to true. This issue has been addressed in released 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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Envoy 安全漏洞
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之前版本存在安全漏洞，该漏洞源于使用 PROXY协议的下游连接可以绕过外部身份验证。
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-2024-23324
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://github.com/envoyproxy/envoy/security/advisories/GHSA-gq3v-vvhj-96j6x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2024-23324
Same Patch Batch · envoyproxy · 2024-02-09 · 5 CVEs total
| CVE-2024-23322 | 7.5 HIGH | Envoy crashes when idle and request per try timeout occur within the backoff interval |
| CVE-2024-23327 | 7.5 HIGH | Crash in proxy protocol when command type of LOCAL in Envoy |
| 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
- CVE-2026-6994
Envoy Query Parameter header_mutation.cc params.add injectio - CVE-2026-26330
Envoy global rate limit may crash when the response phase li - CVE-2026-26311
Envoy HTTP: filter chain execution on reset streams causing - CVE-2026-26310
Crash for scoped ip address in Envoy during DNS - CVE-2026-26309
Envoy has an off-by-one write in JsonEscaper::escapeString()
Same vendor: envoyproxy
- CVE-2026-26330
Envoy global rate limit may crash when the response phase li - CVE-2026-26311
Envoy HTTP: filter chain execution on reset streams causing - CVE-2026-26310
Crash for scoped ip address in Envoy during DNS - CVE-2026-26309
Envoy has an off-by-one write in JsonEscaper::escapeString() - CVE-2026-26308
Envoy has an RBAC Header Validation Bypass via Multi-Value H
Same weakness: CWE-20
V. Comments for CVE-2024-23324
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