CVE-2023-27492

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.

CVSS v3.1

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

CVSS v3.1

4.8 MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H

EPSS

0.69% chance of exploitation in the next 30 days, 50th percentile

Published

2023-04-04

Updated

2025-02-11

Proof-of-concept exploits (1)

• envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2

References

• CVE Record
• NVD entry

Related

• CVE-2019-18801
• CVE-2019-18836
• CVE-2019-9900
• CVE-2022-29225
• CVE-2023-27487
• CVE-2023-27488