Allocation of Resources Without Limits or Throttling

Affecting nginx package, versions <1.10.3-1+deb9u3

Report new vulnerabilities
Do your applications use this vulnerable package? Test your applications

Overview

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

CVSS Score

7.5
high severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    None
  • Availability
    High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE
CVE-2019-9511
CWE
CWE-400 CWE-770
Snyk ID
SNYK-DEBIAN9-NGINX-459584
Disclosed
13 Aug, 2019
Published
13 Aug, 2019