CVE-2024-32475
HIGH
MEDIUM
Priority: 0.05
BB Relevance:
75/100
Published: 2024-04-18
Modified: 2026-11-05
First seen: 2026-11-05
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
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.
Weakness Classification (2)
Affected Software (6)
| Vendor | Product | Version |
|---|---|---|
| envoyproxy | envoy | >= 1.30.0, < 1.30.1 |
| envoyproxy | envoy | >= 1.29.0, < 1.29.4 |
| envoyproxy | envoy | >= 1.28.0, < 1.28.3 |
| envoyproxy | envoy | >= 1.13.0, < 1.27.5 |
| envoyproxy | envoy | 1.13.0 – 1.27.5 |
| envoyproxy | envoy | 1.30.0 |
References & Advisories (2)
x_refsource_MISC
x_refsource_CONFIRM