CVE-2024-27919
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
04/04/2024
Last modified:
04/11/2025
Description
Envoy is a cloud-native, open-source edge and service proxy. In versions 1.29.0 and 1.29.1, theEnvoy HTTP/2 protocol stack is vulnerable to the flood of CONTINUATION frames. Envoy's HTTP/2 codec does not reset a request when header map limits have been exceeded. This allows an attacker to send an sequence of CONTINUATION frames without the END_HEADERS bit set causing unlimited memory consumption. This can lead to denial of service through memory exhaustion. Users should upgrade to versions 1.29.2 to mitigate the effects of the CONTINUATION flood. Note that this vulnerability is a regression in Envoy version 1.29.0 and 1.29.1 only. As a workaround, downgrade to version 1.28.1 or earlier or disable HTTP/2 protocol for downstream connections.
Impact
Base Score 3.x
7.50
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:envoyproxy:envoy:1.29.0:*:*:*:*:*:*:* | ||
| cpe:2.3:a:envoyproxy:envoy:1.29.1:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- http://www.openwall.com/lists/oss-security/2024/04/03/16
- http://www.openwall.com/lists/oss-security/2024/04/05/3
- https://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r
- http://www.openwall.com/lists/oss-security/2024/04/03/16
- http://www.openwall.com/lists/oss-security/2024/04/05/3
- https://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r
- https://www.kb.cert.org/vuls/id/421644