CVE-2024-32475
Last modified
CVE-2024-32475 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.68% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Envoyproxy | Envoy | >= 1.13.0, < 1.27.5 |
| Envoyproxy | Envoy | >= 1.28.0, < 1.28.3 |
| Envoyproxy | Envoy | >= 1.29.0, < 1.29.4 |
| Envoyproxy | Envoy | 1.30.0 |
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-3mh5-6q8v-25wjPatch, Vendor Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-3mh5-6q8v-25wjPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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