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Amazon Linux AMI: CVE-2019-9511: Security patch for nginx ((Multiple Advisories))

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Amazon Linux AMI: CVE-2019-9511: Security patch for nginx ((Multiple Advisories))

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
08/13/2019
Created
10/08/2019
Added
10/04/2019
Modified
10/14/2022

Description

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.

Solution(s)

  • amazon-linux-upgrade-nghttp2
  • amazon-linux-upgrade-nginx

References

  • ALAS-2019-1299
  • USN-4099-1
  • CVE-2019-9511

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