Resource Exhaustion Affecting mod_http2 package, versions <0:1.11.3-3.module+el8.0.0+4096+eb40e6da


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
8.25% (95th percentile)

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  • Snyk IDSNYK-CENTOS8-MODHTTP2-1989612
  • published26 Jul 2021
  • disclosed13 Aug 2019

Introduced: 13 Aug 2019

CVE-2019-9517  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade Centos:8 mod_http2 to version 0:1.11.3-3.module+el8.0.0+4096+eb40e6da or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mod_http2 package and not the mod_http2 package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.

References

CVSS Scores

version 3.1