REDHAT-BUG-2214463
First published: Tue Jun 13 2023(Updated: )
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 <a href="https://github.com/grpc/grpc/pull/32309">https://github.com/grpc/grpc/pull/32309</a> <a href="https://github.com/grpc/grpc/pull/32309">https://github.com/grpc/grpc/pull/32309</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| gRPC | <commit 32309 |
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Reference Links
- https://github.com/grpc/grpc/pull/32309
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2214465
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2214466
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2214467
- https://access.redhat.com/errata/RHSA-2024:10761
- https://bugzilla.redhat.com/show_bug.cgi?id=2214463
Frequently Asked Questions
What is the severity of REDHAT-BUG-2214463?
The severity of REDHAT-BUG-2214463 is medium due to potential desynchronization issues affecting data integrity between gRPC endpoints.
How do I fix REDHAT-BUG-2214463?
To fix REDHAT-BUG-2214463, update to a version of gRPC that includes the patch for the header size exceeded error.
Which versions of gRPC are affected by REDHAT-BUG-2214463?
REDHAT-BUG-2214463 affects versions of gRPC up to commit 32309.
What systems are impacted by REDHAT-BUG-2214463?
Systems using gRPC for communication, particularly those with proxy and backend configurations, are impacted by REDHAT-BUG-2214463.
What is the main issue described in REDHAT-BUG-2214463?
REDHAT-BUG-2214463 describes a desynchronization of HPACK tables due to skipped parsing of HPACK frames when a header size exceeded error occurs.
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