Select your cookie preferences

We use cookies and similar tools to enhance your experience, provide our services, deliver relevant advertising, and make improvements. Approved third parties also use these tools to help us deliver advertising and provide certain site features.

CVE-2023-35944

Public on 2023-07-25
Modified on 2023-08-10
Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Envoy allows mixed-case schemes in HTTP/2, however, some internal scheme checks are case-sensitive. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, this can lead to the rejection of requests with mixed-case schemes such as `htTp` or `htTps`, or the bypassing of some requests such as `https` in unencrypted connections. With a fix in versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, Envoy will now lowercase scheme values by default, and change the internal scheme checks that were case-sensitive to be case-insensitive. There are no known workarounds for this issue.

Severity
Important
See what this means
CVSS v3 Base Score
8.2
See breakdown
Continue reading

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 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
NVD CVSSv3 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

Red Hat: CVE-2023-35944 Mitre: CVE-2023-35944 FAQs regarding Amazon Linux ALAS/CVE Severity