Important: python3

Issue Overview:

An issue was discovered in Python before 3.11.1. An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service. Hostnames are often supplied by remote servers that could be controlled by a malicious actor; in such a scenario, they could trigger excessive CPU consumption on the client attempting to make use of an attacker-supplied supposed hostname. For example, the attack payload could be placed in the Location header of an HTTP response with status code 302. A fix is planned in 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16. (CVE-2022-45061)

Affected Packages:

python3

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 python3 to update your system.

New Packages:

aarch64:  
    python3-3.7.16-1.amzn2.0.1.aarch64  
    python3-libs-3.7.16-1.amzn2.0.1.aarch64  
    python3-devel-3.7.16-1.amzn2.0.1.aarch64  
    python3-tools-3.7.16-1.amzn2.0.1.aarch64  
    python3-tkinter-3.7.16-1.amzn2.0.1.aarch64  
    python3-test-3.7.16-1.amzn2.0.1.aarch64  
    python3-debug-3.7.16-1.amzn2.0.1.aarch64  
    python3-debuginfo-3.7.16-1.amzn2.0.1.aarch64  
  
i686:  
    python3-3.7.16-1.amzn2.0.1.i686  
    python3-libs-3.7.16-1.amzn2.0.1.i686  
    python3-devel-3.7.16-1.amzn2.0.1.i686  
    python3-tools-3.7.16-1.amzn2.0.1.i686  
    python3-tkinter-3.7.16-1.amzn2.0.1.i686  
    python3-test-3.7.16-1.amzn2.0.1.i686  
    python3-debug-3.7.16-1.amzn2.0.1.i686  
    python3-debuginfo-3.7.16-1.amzn2.0.1.i686  
  
src:  
    python3-3.7.16-1.amzn2.0.1.src  
  
x86_64:  
    python3-3.7.16-1.amzn2.0.1.x86_64  
    python3-libs-3.7.16-1.amzn2.0.1.x86_64  
    python3-devel-3.7.16-1.amzn2.0.1.x86_64  
    python3-tools-3.7.16-1.amzn2.0.1.x86_64  
    python3-tkinter-3.7.16-1.amzn2.0.1.x86_64  
    python3-test-3.7.16-1.amzn2.0.1.x86_64  
    python3-debug-3.7.16-1.amzn2.0.1.x86_64  
    python3-debuginfo-3.7.16-1.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2022-45061

Mitre: CVE-2022-45061