CVE-2024-32475

Envoy RELEASE_ASSERT using auto_sni with :authority header > 255 bytes

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.07%
Affected: envoyproxy envoy
Published at:
Updated at:

References

Link Tags
https://github.com/envoyproxy/envoy/security/advisories/GHSA-3mh5-6q8v-25wj
https://github.com/envoyproxy/envoy/commit/b47fc6648d7c2dfe0093a601d44cb704b7bad382

Frequently Asked Questions

What is the severity of CVE-2024-32475?
CVE-2024-32475 has been scored as a high severity vulnerability.
How to fix CVE-2024-32475?
To fix CVE-2024-32475, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-32475 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-32475 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-32475?
CVE-2024-32475 affects envoyproxy envoy.
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