Description
An issue was discovered in Envoy 1.12.0. An untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1. This may be used to corrupt nearby heap contents (leading to a query-of-death scenario) or may be used to bypass Envoy's access control mechanisms such as path based routing. An attacker can also modify requests from other users that happen to be proximal temporally and spatially.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Service Mesh 1 | kiali | v1.0.8.redhat1-1.el7 | RHSA-2019:4222 |
| Red Hat Service Mesh 1 | servicemesh +11 | 1.0.3-1.el8 | RHSA-2019:4222 |
| Red Hat Service Mesh 1 | servicemesh-grafana +1 | 6.2.2-25.el8 | RHSA-2019:4222 |
| Red Hat Service Mesh 1 | servicemesh-prometheus | 2.7.2-26.el8 | RHSA-2019:4222 |
Advisories 1
- RHSA-2019:4222 Red Hat Security Advisory: Red Hat OpenShift Service Mesh 1.0.3 RPMs security update Red Hat Security Advisories (RHSA) · Jun 27, 2026