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CVE-2024-32475

Public on 2024-04-18
Modified on 2024-04-22
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.

Severity
Important
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CVSS v3 Base Score
7.5
See breakdown
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2023 ecs-service-connect-agent 2024-06-19 21:09 ALAS2023-2024-647
Amazon Linux 2 - Ecs Extra ecs-service-connect-agent 2024-06-19 20:39 ALAS2ECS-2024-037

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv3 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Red Hat: CVE-2024-32475 Mitre: CVE-2024-32475 FAQs regarding Amazon Linux ALAS/CVE Severity