Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Envoyproxy | Envoy | >= 1.13.0, < 1.27.5 |
Related Weaknesses (CWE)
References
- https://github.com/envoyproxy/envoy/commit/b47fc6648d7c2dfe0093a601d44cb704b7badPatch
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-3mh5-6q8v-25wjPatchVendor Advisory
- https://github.com/envoyproxy/envoy/commit/b47fc6648d7c2dfe0093a601d44cb704b7badPatch
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-3mh5-6q8v-25wjPatchVendor Advisory
FAQ
What is CVE-2024-32475?
CVE-2024-32475 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2024-32475?
CVE-2024-32475 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-32475?
Check the references section above for vendor advisories and patch information. Affected products include: Envoyproxy Envoy.