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CVE-2023-27492

Public on 2023-04-04
Modified on 2024-02-06
Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the Lua filter is vulnerable to denial of service. Attackers can send large request bodies for routes that have Lua filter enabled and trigger crashes. As of versions versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy no longer invokes the Lua coroutine if the filter has been reset. As a workaround for those whose Lua filter is buffering all requests/ responses, mitigate by using the buffer filter to avoid triggering the local reply in the Lua filter.

Severity
Medium
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CVSS v3 Base Score
4.8
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Ecs Extra ecs-service-connect-agent 2023-04-13 19:51 ALAS2ECS-2023-003
Amazon Linux 2023 ecs-service-connect-agent 2023-04-27 20:00 ALAS2023-2023-165

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H
NVD CVSSv3 4.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H

References

Red Hat: CVE-2023-27492 Mitre: CVE-2023-27492 FAQs regarding Amazon Linux ALAS/CVE Severity