Vulnerability · Published Apr 18, 2024 · Assigned by GitHub_M
CVE-2024-32475Envoy RELEASE_ASSERT using auto_sni with :authority header > 255 bytes
High 7.5
In plain English
A high-severity security flaw in envoy from envoyproxy. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| envoyproxy | envoy | >= 1.30.0, < 1.30.1>= 1.29.0, < 1.29.4>= 1.28.0, < 1.28.3>= 1.13.0, < 1.27.5 |
Weakness: CWE-253, CWE-617 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H