CVE-2023-27493
04.04.2023, 20:15
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, Envoy does not sanitize or escape request properties when generating request headers. This can lead to characters that are illegal in header values to be sent to the upstream service. In the worst case, it can cause upstream service to interpret the original request as two pipelined requests, possibly bypassing the intent of Envoys security policy. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. As a workaround, disable adding request headers based on the downstream request properties, such as downstream certificate properties.
| Vendor | Product | Version |
|---|---|---|
| envoyproxy | envoy | 𝑥 < 1.22.9 |
| envoyproxy | envoy | 1.23.0 ≤ 𝑥 < 1.23.6 |
| envoyproxy | envoy | 1.24.0 ≤ 𝑥 < 1.24.4 |
| envoyproxy | envoy | 1.25.0 ≤ 𝑥 < 1.25.3 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
- CWE-20 - Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.