vulnerability

Amazon Linux 2023: CVE-2023-32731: Important priority package update for grpc

Severity
9
CVSS
(AV:N/AC:M/Au:N/C:C/I:N/A:C)
Published
Jun 9, 2023
Added
Feb 17, 2025
Modified
Jul 9, 2025

Description

When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration. We recommend upgrading beyond the commit contained in  https://github.com/grpc/grpc/pull/33005 https://github.com/grpc/grpc/pull/33005
A flaw was found in gRPC. This flaw allows a remote attacker to obtain sensitive information, caused by a flaw when the gRPC HTTP2 stack raised a header size exceeded error. By sending a specially crafted request, an attacker can obtain sensitive information, and use this information to launch further attacks against the affected system.

Solutions

amazon-linux-2023-upgrade-grpcamazon-linux-2023-upgrade-grpc-cppamazon-linux-2023-upgrade-grpc-cpp-debuginfoamazon-linux-2023-upgrade-grpc-dataamazon-linux-2023-upgrade-grpc-debuginfoamazon-linux-2023-upgrade-grpc-debugsourceamazon-linux-2023-upgrade-grpc-develamazon-linux-2023-upgrade-grpc-docamazon-linux-2023-upgrade-grpc-pluginsamazon-linux-2023-upgrade-grpc-plugins-debuginfo
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