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CVE-2024-32475

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CVE-2024-32475

Published: Apr 18, 2024

Modified: Aug 2, 2024

PUBLISHED

CVSS v3.1

7.5

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.

VendorProductVersions

envoyproxy

envoy

affected
>= 1.30.0, < 11.30.1
affected
>= 1.29.0, < 1.29.4
affected
>= 1.28.0, < 1.28.3
affected
>= 1.13.0, < 1.27.5

Weaknesses (CWE)

CWE-253
CWE-617

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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