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CVE-2024-27919

7.5 · HIGH

Envoy is a cloud-native, open-source edge and service proxy.

Published Apr 4, 2024CWE-390EPSS 86.75%

Overview

CVE-2024-27919 is a high-severity vulnerability. It was published on April 4, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2024/04/03/16Refwww.openwall.com/lists/oss-security/2024/04/05/3GitHubgithub.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5GitHubgithub.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799rRefwww.openwall.com/lists/oss-security/2024/04/03/16Refwww.openwall.com/lists/oss-security/2024/04/05/3GitHubgithub.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5GitHubgithub.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799rRefwww.kb.cert.org/vuls/id/421644

How CyberStrike helps

Frequently asked questions

What is CVE-2024-27919?

CVE-2024-27919 is a high-severity vulnerability. It was published on April 4, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-27919?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-27919?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-27919?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-27919 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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