Medium: python3

Issue Overview:

Python’s elementtree C accelerator failed to initialise Expat’s hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by contructing an XML document that would cause pathological hash collisions in Expat’s internal data structures, consuming large amounts CPU and RAM.(CVE-2018-14647)

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:  
    python3-3.7.1-9.amzn2.0.1.aarch64  
    python3-libs-3.7.1-9.amzn2.0.1.aarch64  
    python3-devel-3.7.1-9.amzn2.0.1.aarch64  
    python3-tools-3.7.1-9.amzn2.0.1.aarch64  
    python3-tkinter-3.7.1-9.amzn2.0.1.aarch64  
    python3-test-3.7.1-9.amzn2.0.1.aarch64  
    python3-debug-3.7.1-9.amzn2.0.1.aarch64  
    python3-debuginfo-3.7.1-9.amzn2.0.1.aarch64  
  
i686:  
    python3-3.7.1-9.amzn2.0.1.i686  
    python3-libs-3.7.1-9.amzn2.0.1.i686  
    python3-devel-3.7.1-9.amzn2.0.1.i686  
    python3-tools-3.7.1-9.amzn2.0.1.i686  
    python3-tkinter-3.7.1-9.amzn2.0.1.i686  
    python3-test-3.7.1-9.amzn2.0.1.i686  
    python3-debug-3.7.1-9.amzn2.0.1.i686  
    python3-debuginfo-3.7.1-9.amzn2.0.1.i686  
  
src:  
    python3-3.7.1-9.amzn2.0.1.src  
  
x86_64:  
    python3-3.7.1-9.amzn2.0.1.x86_64  
    python3-libs-3.7.1-9.amzn2.0.1.x86_64  
    python3-devel-3.7.1-9.amzn2.0.1.x86_64  
    python3-tools-3.7.1-9.amzn2.0.1.x86_64  
    python3-tkinter-3.7.1-9.amzn2.0.1.x86_64  
    python3-test-3.7.1-9.amzn2.0.1.x86_64  
    python3-debug-3.7.1-9.amzn2.0.1.x86_64  
    python3-debuginfo-3.7.1-9.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2018-14647

Mitre: CVE-2018-14647