Homepage
About Snyk

Improper Enforcement of Message or Data Structure Affecting libnghttp2 package, versions <0:1.33.0-1.1.6.amzn1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 1.09% (85th percentile)
Expand this section
NVD
7.5 high
Expand this section
SUSE
7.5 high
Expand this section
Red Hat
7.5 high

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-AMZN201803-LIBNGHTTP2-1723163
  • published 27 Sep 2021
  • disclosed 3 Jun 2020
Report a new vulnerability Found a mistake?

Introduced: 3 Jun 2020

CVE-2020-11080 Open this link in a new tab
CWE-707 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2018.03 libnghttp2 to version 0:1.33.0-1.1.6.amzn1 or higher.
This issue was patched in ALAS-2020-1404.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libnghttp2 package and not the libnghttp2 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.

References