CVE-2023-35944
Envoy is an open source edge and service proxy designed for cloud-native applications. Envoy allows mixed-case schemes in HTTP/2, however, some internal scheme checks are case-sensitive. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, this can lead to the rejection of requests with mixed-case schemes such as htTp or htTps, or the bypassing of some requests such as https in unencrypted connections. With a fix in versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, Envoy will now lowercase scheme values by default, and change the internal scheme checks that were case-sensitive to be case-insensitive. There are no known workarounds for this issue.
| Software | From | Fixed in |
|---|---|---|
| envoyproxy / envoy | 1.24.0 | 1.24.10 |
| envoyproxy / envoy | 1.25.0 | 1.25.9 |
| envoyproxy / envoy | 1.26.0 | 1.26.4 |
| envoyproxy / envoy | 1.23.0 | 1.23.12 |
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