CVE-2023-27496— Envoy may crash when a redirect url without a state param is received in the oauth filter
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I. Basic Information for CVE-2023-27496
Vulnerability Information
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Vulnerability Title
Envoy may crash when a redirect url without a state param is received in the oauth filter
Source: NVD (National Vulnerability Database)
Vulnerability Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the OAuth filter assumes that a `state` query param is present on any response that looks like an OAuth redirect response. Sending it a request with the URI path equivalent to the redirect path, without the `state` parameter, will lead to abnormal termination of Envoy process. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. The issue can also be mitigated by locking down OAuth traffic, disabling the filter, or by filtering traffic before it reaches the OAuth filter (e.g. via a lua script).
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Envoy 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy是一款开源的分布式代理服务器。 Envoy 1.22.9之后版本存在输入验证错误漏洞。攻击者利用该漏洞导致Envoy进程异常终止。
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 | >= 1.25.0, < 1.25.3 | - |
II. Public POCs for CVE-2023-27496
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · envoyproxy · 2023-04-04 · 6 CVEs total
| CVE-2023-27487 | 8.2 HIGH | Envoy client may fake the header `x-envoy-original-path` |
| CVE-2023-27493 | 8.1 HIGH | Envoy doesn't escape HTTP header values |
| CVE-2023-27488 | 5.4 MEDIUM | Envoy gRPC client produces invalid protobuf when an HTTP header with non-UTF8 value is rec |
| CVE-2023-27491 | 5.4 MEDIUM | Envoy forwards invalid Http2/Http3 downstream headers |
| CVE-2023-27492 | 4.8 MEDIUM | Envoy may crash when a large request body is processed in Lua filter |
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-2023-27496
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