CVE-2024-7246

Public Exploit
HPACK table poisoning in gRPC C++, Python & Ruby

Description

It's possible for a gRPC client communicating with a HTTP/2 proxy to poison the HPACK table between the proxy and the backend such that other clients see failed requests. It's also possible to use this vulnerability to leak other clients HTTP header keys, but not values. This occurs because the error status for a misencoded header is not cleared between header reads, resulting in subsequent (incrementally indexed) added headers in the first request being poisoned until cleared from the HPACK table. Please update to a fixed version of gRPC as soon as possible. This bug has been fixed in 1.58.3, 1.59.5, 1.60.2, 1.61.3, 1.62.3, 1.63.2, 1.64.3, 1.65.4.

Category

6.3
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
EPSS 0.05%
Affected: Google gRPC
Published at:
Updated at:

References

Link Tags
https://github.com/grpc/grpc/issues/36245 patch exploit issue tracking

Frequently Asked Questions

What is the severity of CVE-2024-7246?
CVE-2024-7246 has been scored as a medium severity vulnerability.
How to fix CVE-2024-7246?
To fix CVE-2024-7246, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-7246 being actively exploited in the wild?
It is possible that CVE-2024-7246 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-7246?
CVE-2024-7246 affects Google gRPC.
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