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Fencer Vulns
high 7.5

CVE-2024-32976 json

Envoy can enter an endless loop while decompressing Brotli data with extra input

published 2024-06-04 2 y ago modified 2026-11-05 3 d ago also BIT-envoy-2024-32976 , EUVD-2024-30728 , GHSA-7wp5-c2vq-4f8m

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

Envoy is a cloud-native, open source edge and service proxy. Envoyproxy with a Brotli filter can get into an endless loop during decompression of Brotli data with extra input.

Patch / fix

  • bitnami envoy 1.27.6, 1.28.4, 1.29.5, 1.30.2
  • envoyproxy envoy 1.27.6, 1.28.4, 1.29.5, 1.30.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-32976 updated cvss 7.5

envoy: Brotli decompressor infinite loop

  • Red Hat OpenShift Service Mesh 2 servicemesh-proxy, servicemesh-proxy-wasm
    affected: no fix planned “Will not fix”
  • Red Hat RHOSSM 2.4 for RHEL 8 openshift-service-mesh/pilot-rhel8 2.4.11-2, openshift-service-mesh/kiali-rhel8 1.65.16-4, openshift-service-mesh/grafana-rhel8 2.4.11-2, openshift-service-mesh/proxyv2-rhel8 2.4.11-5, openshift-service-mesh/istio-cni-rhel8 2.4.11-2, openshift-service-mesh/ratelimit-rhel8 2.4.11-2, +1 more
    fixed: vendor fix RHSA-2024:7724
  • Red Hat RHOSSM 2.5 for RHEL 8 openshift-service-mesh/pilot-rhel8 2.5.5-4, openshift-service-mesh/grafana-rhel8 2.5.5-3, openshift-service-mesh/kiali-rhel8 1.73.15-3, openshift-service-mesh/proxyv2-rhel8 2.5.5-6, openshift-service-mesh/istio-cni-rhel8 2.5.5-4, openshift-service-mesh/ratelimit-rhel8 2.5.5-3, +2 more
    fixed: vendor fix RHSA-2024:7725

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/envoyproxy/envoy/security/advisories/GHSA-7wp5-c2vq-4f8m referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami envoy
>=1.18.0, <1.27.6
>=1.28.0, <1.28.4
>=1.29.0, <1.29.5
>=1.30.0, <1.30.2
1.27.6
1.28.4
1.29.5
1.30.2

Affected products

  • envoyproxy envoy

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.