CVEvulnerability
CVE-2024-27919
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2024-04-04
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-390
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.
Affected configurations
• envoyproxy envoy 1.29.0
• envoyproxy envoy 1.29.1
Related
Weakness · CWE (1)
- CWE-390 Detection of Error Condition Without Action weakness
References
- http://www.openwall.com/lists/oss-security/2024/04/03/16 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/04/05/3 Mailing List
- https://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5 Patch
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/04/03/16 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/04/05/3 Mailing List
- https://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5 Patch
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r Patch, Third Party Advisory
- https://www.kb.cert.org/vuls/id/421644 www.kb.cert.org