Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy does not sanitize or escape request properties when generating request headers. This can lead to characters that are illegal in header values to be sent to the upstream service. In the worst case, it can cause upstream service to interpret the original request as two pipelined requests, possibly bypassing the intent of Envoy’s security policy. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. As a workaround, disable adding request headers based on the downstream request properties, such as downstream certificate properties.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| envoyproxy | envoy | >= 1.25.0, < 1.25.3, >= 1.24.0, < 1.24.4, >= 1.23.0, < 1.23.6, < 1.22.9 | — |
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.
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | ecs-service-connect-agent | v1.25.4.0-1.amzn2023 | ALAS2023-2023-165 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | istio +1 | 1.15.7-1.el8 | ELSA-2023-12356, ELSA-2023-12354 |
| Oracle Linux 8 | kubeadm +2 | 1.24.8-2.el8 | ELSA-2023-12356, ELSA-2023-12354 |
| Oracle Linux 8 | olcne-rook-chart +4 | 1.6.1-9.el8 | ELSA-2023-23648, ELSA-2023-12354 |
| Oracle Linux 8 | olcnectl +11 | 1.5.12-6.el8 | ELSA-2023-12356, ELSA-2023-12354 |
| Oracle Linux 7 | istio +1 | 1.15.7-1.el7 | ELSA-2023-12357, ELSA-2023-12355 |
| Oracle Linux 7 | kubeadm +2 | 1.24.8-2.el7 | ELSA-2023-12357, ELSA-2023-12355 |
| Oracle Linux 7 | olcne-rook-chart +4 | 1.6.1-9.el7 | ELSA-2023-23649, ELSA-2023-12355 |
| Oracle Linux 7 | olcnectl +11 | 1.5.12-6.el7 | ELSA-2023-12357, ELSA-2023-12355 |
Advisories 8
- WID-SEC-2023-2058 Red Hat OpenShift Service Mesh und Service Mesh Containers: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 8, 2023
- ELSA-2023-23649 Important: olcne security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 2, 2023
- ELSA-2023-12356 Important: istio security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 2, 2023
- ELSA-2023-23648 Important: olcne security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 2, 2023
- ELSA-2023-12354 Important: istio security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 2, 2023
- ELSA-2023-12357 Important: istio security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 2, 2023
- ELSA-2023-12355 Important: istio security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 2, 2023
- ALAS2023-2023-165 Important: ecs-service-connect-agent security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 3, 2023