CVE-2023-27487— Envoy client may fake the header `x-envoy-original-path`
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I. Basic Information for CVE-2023-27487
Vulnerability Information
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Vulnerability Title
Envoy client may fake the header `x-envoy-original-path`
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 client may bypass JSON Web Token (JWT) checks and forge fake original paths. The header `x-envoy-original-path` should be an internal header, but Envoy does not remove this header from the request at the beginning of request processing when it is sent from an untrusted client. The faked header would then be used for trace logs and grpc logs, as well as used in the URL used for `jwt_authn` checks if the `jwt_authn` filter is used, and any other upstream use of the x-envoy-original-path header. Attackers may forge a trusted `x-envoy-original-path` header. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 have patches for this issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
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 存在输入验证错误漏洞，该漏洞源于客户端可能会绕过 JSON Web Token (JWT) 检查并伪造伪造的原始路径。
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-2023-27487
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|---|
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- https://github.com/envoyproxy/envoy/security/advisories/GHSA-5375-pq35-hf2gx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2023-27487
Same Patch Batch · envoyproxy · 2023-04-04 · 6 CVEs total
| CVE-2023-27493 | 8.1 HIGH | Envoy doesn't escape HTTP header values |
| CVE-2023-27496 | 6.5 MEDIUM | Envoy may crash when a redirect url without a state param is received in the oauth filter |
| 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-2023-27487
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