Bug 2214463 (CVE-2023-32731)

Summary: CVE-2023-32731 gRPC: sensitive information disclosure
Product: [Other] Security Response Reporter: Avinash Hanwate <ahanwate>
Component: vulnerabilityAssignee: Nobody <nobody>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, jburrell, rogbas, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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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.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2214467, 2214465, 2214466    
Bug Blocks: 2213811    

Description Avinash Hanwate 2023-06-13 05:57:43 UTC 
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/32309 https://github.com/grpc/grpc/pull/32309
Comment 1 Avinash Hanwate 2023-06-13 06:00:07 UTC 
Created flatbuffers tracking bugs for this issue:

Affects: fedora-all [bug 2214465]


Created grpc tracking bugs for this issue:

Affects: fedora-all [bug 2214466]
Affects: openstack-rdo [bug 2214467]