CVE-2024-7246

A flaw was found in Google gRPC due to HPACK table poisoning between the proxy and backend so that other clients see failed requests, resulting in a denial of service. This occurs because the error status for a misencoded header is not cleared between header reads, resulting in subsequent (incrementally indexed) added headers in the first request being poisoned until cleared from the HPACK table. By sending a specially crafted request, an attacker could leak other clients HTTP header keys. Attackers are only able to access HTTP header keys but not values.

This vulnerability is specific to C++ implementations of gRPC release and does not affect Golang or Java implementations of gRPC.

The gRPC RPM was packaged with Openshift via the Kuryr component. However, Kuryr was never configured to run code using the gRPC library, hence, grpcio dependency has been removed from Kuryr since Openshift-4.12.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.