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GHSA-cfgp-2977-2fmm

Connection confusion in gRPC

Source: GitHub Advisory Database (reviewed) High CVE-2023-32731

Packages

EcosystemPackageAffectedFixed in
Maven io.grpc:grpc-protobuf >= 1.53.0, < 1.53.1 1.53.1
PyPI grpcio >= 1.53.0, < 1.53.1 1.53.1
RubyGems grpc >= 1.53.0, < 1.53.1 1.53.1
PyPI grpcio >= 1.54.0, < 1.54.2 1.54.2
RubyGems grpc >= 1.54.0, < 1.54.2 1.54.2
Maven io.grpc:grpc-protobuf >= 1.54.0, < 1.54.2 1.54.2

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.