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Allocation of Resources Without Limits or Throttling The advisory has been revoked - it doesn't affect any version of package nghttp2 Open this link in a new tab

    Threat Intelligence

    EPSS 9.69% (95th percentile)
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NVD
7.5 high
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SUSE
7.5 high
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Red Hat
6.5 medium

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  • Snyk ID SNYK-UBUNTU1904-NGHTTP2-531003
  • published 13 Aug 2019
  • disclosed 13 Aug 2019
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Introduced: 13 Aug 2019

CVE-2019-9511 Open this link in a new tab
CWE-770 Open this link in a new tab

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:19.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nghttp2 package and not the nghttp2 package as distributed by Ubuntu.

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

References