# CVE-2024-32475: ecs-service-connect-agent: Envoy is a cloud-native, open source edge and service proxy

CVE-2024-32475 is fixed in ecs-service-connect-agent on 1 platform by ALAS2023-2024-647 (version v1.29.5.0-1.amzn2023), released June 19, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-32475
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0068
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 19, 2024

## Description

Envoy is a cloud-native, open source edge and service proxy. When an upstream TLS cluster is used with `auto_sni` enabled, a request containing a `host`/`:authority` header longer than 255 characters triggers an abnormal termination of Envoy process. Envoy does not gracefully handle an error when setting SNI for outbound TLS connection. The error can occur when Envoy attempts to use the `host`/`:authority` header value longer than 255 characters as SNI for outbound TLS connection. SNI length is limited to 255 characters per the standard. Envoy always expects this operation to succeed and abnormally aborts the process when it fails. This vulnerability is fixed in 1.30.1, 1.29.4, 1.28.3, and 1.27.5.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ecs-service-connect-agent amzn 2023 | v1.29.5.0-1.amzn2023 | [ALAS2023-2024-647](https://patchblox.com/security/data/fix/linux/alas2023-2024-647.md) | Jun 19, 2024 |

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