Resource Exhaustion Affecting python39:3.9/python39-pyyaml package, versions <0:5.4.1-1.module_el8.6.0+2780+a40f65e1


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.44% (75th percentile)

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 Learn

Learn about Resource Exhaustion vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-ALMALINUX8-PYTHON39-5726687
  • published28 May 2023
  • disclosed9 Nov 2021

Introduced: 9 Nov 2021

CVE-2021-33503  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 python39:3.9/python39-pyyaml to version 0:5.4.1-1.module_el8.6.0+2780+a40f65e1 or higher.
This issue was patched in ALSA-2021:4160.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python39:3.9/python39-pyyaml package and not the python39:3.9/python39-pyyaml package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

CVSS Scores

version 3.1