Allocation of Resources Without Limits or Throttling Affecting apache2 package, versions <2.4.41-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
3.53% (92nd percentile)

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  • Snyk IDSNYK-ALPINE313-APACHE2-1066616
  • published13 Aug 2019
  • disclosed13 Aug 2019

Introduced: 13 Aug 2019

CVE-2019-9517  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Alpine:3.13 apache2 to version 2.4.41-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apache2 package and not the apache2 package as distributed by Alpine. See How to fix? for Alpine:3.13 relevant fixed versions and status.

Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.

References

CVSS Scores

version 3.1