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CVE-2024-30255

70
FAUCET Score

CVE-2024-30255 is a CPU exhaustion vulnerability affecting Envoy proxy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8. Attackers can exploit a flaw in Envoy's HTTP/2 protocol stack by sending a flood of CONTINUATION frames, leading to denial of service. This vulnerability has a CVSS score of 7.5 (HIGH) due to its network-based attack vector, low attack complexity, and high impact on availability. While there is no known active exploitation or public exploit code, the vulnerability has garnered significant community discussion and media coverage, indicating high awareness.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.26.8CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
>= 1.27.0, < 1.27.4CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
>= 1.28.0, < 1.28.2CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
>= 1.29.0, < 1.29.3CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
87.81%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.8781 is in the 100th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (26)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Service Mesh 2.5 for RHEL 8Fixed in: openshift-service-mesh/ratelimit-rhel8:2.5.5-3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Service Mesh 2.5 for RHEL 8Fixed in: openshift-service-mesh/pilot-rhel8:2.5.5-4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Service Mesh 2.5 for RHEL 8Fixed in: openshift-service-mesh/proxyv2-rhel8:2.5.5-6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Migration Toolkit for Containers 1.7Fixed in: rhmtc/openshift-migration-velero-plugin-for-gcp-rhel8:v1.7.16-6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Service Mesh 2.5 for RHEL 8Fixed in: openshift-service-mesh/grafana-rhel8:2.5.5-3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Service Mesh 2.5 for RHEL 8Fixed in: openshift-service-mesh/istio-cni-rhel8:2.5.5-4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Service Mesh 2.5 for RHEL 8Fixed in: openshift-service-mesh/istio-must-gather-rhel8:2.5.5-4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Service Mesh 2.5 for RHEL 8Fixed in: openshift-service-mesh/kiali-ossmc-rhel8:1.73.14-3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Service Mesh 2.5 for RHEL 8Fixed in: openshift-service-mesh/kiali-rhel8:1.73.15-3
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Data Science (RHODS)Fixed in: rhods/odh-operator-base-rhel8
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Data Science (RHODS)Fixed in: rhods/odh-ml-pipelines-cache-rhel8
redhatno patchvia redhat_api
Product: Red Hat Openshift Sandboxed ContainersFixed in: openshift-sandboxed-containers/osc-rhel9-operator
redhatno patchvia redhat_api
Product: Logical Volume Manager StorageFixed in: lvms4/topolvm-rhel9
redhatno patchvia redhat_api
Product: Red Hat Ceph Storage 5Fixed in: rhceph/rhceph-5-dashboard-rhel8
redhatno patchvia redhat_api
Product: Red Hat Ceph Storage 7Fixed in: rhceph/grafana-rhel9
redhatno patchvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift-selinuxd-container
redhatend of lifevia redhat_api
Product: Red Hat Ceph Storage 6Fixed in: rhceph/rhceph-6-dashboard-rhel9
redhatend of lifevia redhat_api
Product: Red Hat OpenShift distributed tracing 3Fixed in: rhosdt/opentelemetry-rhel8-operator
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-contour-rhel8
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Dev SpacesFixed in: devspaces/devspaces-rhel8-operator
redhatend of lifevia redhat_api
Product: Red Hat Openshift Container Storage 4Fixed in: ocs4/cephcsi-rhel8
redhatend of lifevia redhat_api
Product: Custom Metric Autoscaler operator for Red Hat OpenshiftFixed in: custom-metrics-autoscaler-tech-preview/custom-metrics-autoscaler-rhel8
redhatend of lifevia redhat_api
Product: Migration Toolkit for Applications 6Fixed in: mta/mta-hub-rhel8
redhatend of lifevia redhat_api
Product: OpenShift ServerlessFixed in: openshift-serverless-1/eventing-mtping-rhel8
redhatend of lifevia redhat_api
Product: Red Hat OpenShift distributed tracing 2Fixed in: rhosdt/tempo-gateway-rhel8

Vendor Advisories (1)

redhatCVE-2024-30255Moderate

envoy: HTTP/2 CPU exhaustion due to CONTINUATION frame flood

Apr 3, 2024

References

kb.cert.org / vuls/id/421644
github.com / envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm
PatchThird Party Advisory
openwall.com / lists/oss-security/2024/04/03/16
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2024/04/05/3
Mailing List