Allocation of Resources Without Limits or Throttling Affecting nghttp2 package, versions *



    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 10.24% (95th percentile)
Expand this section
7.5 high
Expand this section
7.5 high
Expand this section
Red Hat
6.5 medium

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  • Snyk ID SNYK-UBUNTU1804-NGHTTP2-459213
  • published 13 Aug 2019
  • disclosed 13 Aug 2019

How to fix?

There is no fixed version for Ubuntu:18.04 nghttp2.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nghttp2 package and not the nghttp2 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

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.