Vulnerability Details CVE-2023-32731
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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 16.2%
CVSS Severity
CVSS v3 Score 7.4
References
Products affected by CVE-2023-32731
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cpe:2.3:a:grpc:grpc:1.53.0
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cpe:2.3:a:grpc:grpc:1.53.1
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cpe:2.3:a:grpc:grpc:1.53.2
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cpe:2.3:a:grpc:grpc:1.54.0
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cpe:2.3:a:grpc:grpc:1.54.1
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cpe:2.3:a:grpc:grpc:1.54.2
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cpe:2.3:a:grpc:grpc:1.54.3