Resource Exhaustion Affecting httpd24-httpd-devel package, versions <0:2.4.34-8.el7.1


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
27.04% (97th percentile)

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  • Snyk IDSNYK-RHEL7-HTTPD24HTTPDDEVEL-4765134
  • published26 Jul 2021
  • disclosed13 Aug 2019

Introduced: 13 Aug 2019

CVE-2019-9511  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade RHEL:7 httpd24-httpd-devel to version 0:2.4.34-8.el7.1 or higher.
This issue was patched in RHSA-2019:2949.

NVD Description

Note: Versions mentioned in the description apply only to the upstream httpd24-httpd-devel package and not the httpd24-httpd-devel package as distributed by RHEL. See How to fix? for RHEL:7 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.

References

CVSS Scores

version 3.1