CVE-2023-27492
First published: Thu Mar 16 2023(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Envoyproxy Envoy | <1.22.9 | |
| Envoyproxy Envoy | >=1.23.0<1.23.6 | |
| Envoyproxy Envoy | >=1.24.0<1.24.4 | |
| Envoyproxy Envoy | >=1.25.0<1.25.3 |
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Frequently Asked Questions
What is CVE-2023-27492 vulnerability?
CVE-2023-27492 is a vulnerability in Envoy that allows attackers to trigger crashes by sending large request bodies for routes that have the Lua filter enabled.
Which versions of Envoy are affected by CVE-2023-27492?
Envoy versions 1.22.9, 1.23.0 to 1.23.6, 1.24.0 to 1.24.4, and 1.25.0 to 1.25.3 are affected by CVE-2023-27492.
What is the severity of CVE-2023-27492?
The severity of CVE-2023-27492 is medium, with a CVSS score of 6.5.
How can I fix CVE-2023-27492 vulnerability?
To fix the CVE-2023-27492 vulnerability, update to Envoy versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, or 1.22.9 or later.
Where can I find more information about CVE-2023-27492?
You can find more information about CVE-2023-27492 at the following references: [1] GitHub Advisory: https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2 [2] Red Hat Security Advisory: https://access.redhat.com/errata/RHSA-2023:4623 [3] Red Hat CVE page: https://access.redhat.com/security/cve/cve-2023-27492
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- vendor/envoyproxy
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- version/envoyproxy envoy/1.23.0
- version/envoyproxy envoy/1.24.0
- version/envoyproxy envoy/1.25.0