Description
Istio before 1.8.6 and 1.9.x before 1.9.5 contains a remotely exploitable vulnerability where an external client can access unexpected services in the cluster, bypassing authorization checks, when a gateway is configured with AUTO_PASSTHROUGH routing configuration.
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 2 | servicemesh +5 | 2.0.5-3.el8 | RHSA-2021:2061 |
| Red Hat Service Mesh 1 | servicemesh +8 | 1.1.15-4.el8 | RHSA-2021:2085 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | istio +3 | 1.9.6-2.el8 | ELSA-2021-9398, ELSA-2021-9396 |
| Oracle Linux 8 | kubeadm +2 | 1.18.18-3.el8 | ELSA-2021-9398, ELSA-2021-9396 |
| Oracle Linux 8 | olcne-olm-chart +1 | 1.3.1-5.el8 | ELSA-2021-9398 |
| Oracle Linux 8 | olcnectl +6 | 1.2.4-5.el8 | ELSA-2021-9398, ELSA-2021-9396 |
| Oracle Linux 7 | istio +1 | 1.9.6-2.el7 | ELSA-2021-9399, ELSA-2021-9397 |
| Oracle Linux 7 | kubeadm +2 | 1.18.18-3.el7 | ELSA-2021-9399, ELSA-2021-9397 |
| Oracle Linux 7 | olcne-olm-chart +1 | 1.3.1-5.el7 | ELSA-2021-9399 |
| Oracle Linux 7 | olcnectl +6 | 1.2.4-5.el7 | ELSA-2021-9399, ELSA-2021-9397 |
Advisories 6
- RHSA-2021:2061 Red Hat Security Advisory: Red Hat OpenShift Service Mesh 2.0.5 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2021:2085 Red Hat Security Advisory: servicemesh security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- ELSA-2021-9398 Important: olcne security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 6, 2021
- ELSA-2021-9396 Important: olcne security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 6, 2021
- ELSA-2021-9399 Important: olcne security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 6, 2021
- ELSA-2021-9397 Important: olcne security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 6, 2021