Medium: python-urllib3

Issue Overview:

A flaw was found in python-urllib3. When provided with a URL containing many @ characters in the authority component, the authority’s regular expression exhibits catastrophic backtracking. This flaw causes a denial of service if a URL is passed as a parameter or redirected via an HTTP redirect. The highest threat from this vulnerability is to system availability. (CVE-2021-33503)

Affected Packages:

python-urllib3

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update python-urllib3 to update your system.

New Packages:

noarch:  
    python-urllib3-1.25.9-1.amzn2.0.2.noarch  
  
src:  
    python-urllib3-1.25.9-1.amzn2.0.2.src  

Additional References

Red Hat: CVE-2021-33503

Mitre: CVE-2021-33503