RHSA-2021:1538 - Security Advisory

Topic

An update for servicemesh and servicemesh-proxy is now available for OpenShift Service Mesh 2.0.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Red Hat OpenShift Service Mesh is Red Hat's distribution of the Istio service mesh project, tailored for installation into an on-premise OpenShift Container Platform installation.

Security Fix(es):

• envoyproxy/envoy: HTTP request with escaped slash characters can bypass Envoy's authorization mechanisms (CVE-2021-29492)
• istio/istio: HTTP request with escaped slash characters can bypass authorization mechanisms (CVE-2021-31920)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat OpenShift Service Mesh 2.0 for RHEL 8 x86_64
• Red Hat OpenShift Service Mesh for Power 2.0 for RHEL 8 ppc64le
• Red Hat OpenShift Service Mesh for IBM Z 2.0 for RHEL 8 s390x

Fixes

• BZ - 1951188 - CVE-2021-29492 envoyproxy/envoy: HTTP request with escaped slash characters can bypass Envoy's authorization mechanisms
• BZ - 1959481 - CVE-2021-31920 istio/istio: HTTP request with escaped slash characters can bypass authorization mechanisms

CVEs

• CVE-2021-29492
• CVE-2021-31920

References

• https://access.redhat.com/security/updates/classification/#important