Allocation of Resources Without Limits or Throttling The advisory has been revoked - it doesn't affect any version of package apache2 (opens in a new tab)

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27.89% (98^th percentile)

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Snyk IDSNYK-UBUNTU1604-APACHE2-459183
published13 Aug 2019
disclosed13 Aug 2019

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Introduced: 13 Aug 2019

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

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:16.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apache2 package and not the apache2 package as distributed by Ubuntu.

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.