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CVE-2023-35941

Public on 2023-07-25
Modified on 2024-02-02
Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, a malicious client is able to construct credentials with permanent validity in some specific scenarios. This is caused by the some rare scenarios in which HMAC payload can be always valid in OAuth2 filter's check. Versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12 have a fix for this issue. As a workaround, avoid wildcards/prefix domain wildcards in the host's domain configuration.

Severity
Important
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CVSS v3 Base Score
8.6
See breakdown
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Ecs Extra ecs-service-connect-agent 2023-09-14 01:06 ALAS2ECS-2023-007
Amazon Linux 2 - Ecs Extra ecs-service-connect-agent 2023-08-17 17:04 ALAS2ECS-2023-006
Amazon Linux 2023 ecs-service-connect-agent 2023-09-14 00:54 ALAS2023-2023-344
Amazon Linux 2023 ecs-service-connect-agent 2023-08-17 11:20 ALAS2023-2023-300

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
NVD CVSSv3 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Red Hat: CVE-2023-35941 Mitre: CVE-2023-35941 FAQs regarding Amazon Linux ALAS/CVE Severity