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

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

Severity
7
CVSS
(AV:N/AC:H/Au:N/C:C/I:N/A:C)
Published
06/09/2023
Created
02/14/2025
Added
02/14/2025
Modified
02/14/2025

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.

Solution(s)

  • amazon-linux-2023-upgrade-grpc
  • amazon-linux-2023-upgrade-grpc-cpp
  • amazon-linux-2023-upgrade-grpc-cpp-debuginfo
  • amazon-linux-2023-upgrade-grpc-data
  • amazon-linux-2023-upgrade-grpc-debuginfo
  • amazon-linux-2023-upgrade-grpc-debugsource
  • amazon-linux-2023-upgrade-grpc-devel
  • amazon-linux-2023-upgrade-grpc-doc
  • amazon-linux-2023-upgrade-grpc-plugins
  • amazon-linux-2023-upgrade-grpc-plugins-debuginfo

References

  • https://attackerkb.com/topics/cve-2023-32731
  • CVE - 2023-32731
  • https://alas.aws.amazon.com/AL2023/ALAS-2023-282.html
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