Allocation of Resources Without Limits or Throttling Affecting hey package, versions <0.1.4-r8


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.36% (73rd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-HEY-6036033
  • published12 Oct 2023
  • disclosed11 Oct 2023

Introduced: 11 Oct 2023

CVE-2023-39325  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Chainguard hey to version 0.1.4-r8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream hey package and not the hey package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.

References

CVSS Scores

version 3.1