high7.4
CVE-2023-32731
Connection confusion in gRPC
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | io.grpc:grpc-protobuf | >= 1.53.0, < 1.53.1 | 1.53.1 |
| pip | grpcio | >= 1.53.0, < 1.53.1 | 1.53.1 |
| rubygems | grpc | >= 1.53.0, < 1.53.1 | 1.53.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Grpc | Grpc | from 1.53.0 before 1.55.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/grpc/grpc/pull/32309
- https://github.com/grpc/grpc/pull/33005
- https://github.com/advisories/GHSA-cfgp-2977-2fmm
- https://nvd.nist.gov/vuln/detail/CVE-2023-32731
- https://github.com/grpc/grpc/issues/33463
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/grpc/CVE-2023-32731.yml
- https://github.com/grpc/grpc/commit/29d8beee0ac2555773b2a2dda5601c74a95d6c10
- https://github.com/grpc/grpc/commit/65a2a895afaf1d2072447b9baf246374b182a946
- https://github.com/grpc/grpc/releases/tag/v1.53.1
- https://github.com/grpc/grpc/releases/tag/v1.54.2