Allocation of Resources Without Limits or Throttling Affecting h2o/h2o package, versions [0,]


Severity

Recommended
0.0
low
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Not Defined
EPSS
0.14% (52nd percentile)

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  • Snyk IDSNYK-UNMANAGED-H2OH2O-6125590
  • published14 Dec 2023
  • disclosed12 Dec 2023
  • credit@marten-seemann

Introduced: 12 Dec 2023

CVE-2023-50247  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

A fix was pushed into the master branch but not yet published.

Overview

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling when is serving HTTP/3 protocol. A remote attacker can exploit this vulnerability to progressively increase the memory retained by the QUIC stack.

Note:

HTTP/1 and HTTP/2 are not affected by this vulnerability as they do not use QUIC.

Workaround

This vulnerability can be mitigated by disabling HTTP/3 support. For guidance on this, see HTTP/3 configuration directives

References

CVSS Scores

version 3.1