Important: zsh

Issue Overview:

In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option. Zsh fails to overwrite the saved uid, so the original privileges can be restored by executing MODULE_PATH=/dir/with/module zmodload with a module that calls setuid(). (CVE-2019-20044)

Affected Packages:

zsh

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 zsh to update your system.

New Packages:

aarch64:  
    zsh-5.7.1-6.amzn2.0.1.aarch64  
    zsh-debuginfo-5.7.1-6.amzn2.0.1.aarch64  
  
i686:  
    zsh-5.7.1-6.amzn2.0.1.i686  
    zsh-debuginfo-5.7.1-6.amzn2.0.1.i686  
  
noarch:  
    zsh-html-5.7.1-6.amzn2.0.1.noarch  
  
src:  
    zsh-5.7.1-6.amzn2.0.1.src  
  
x86_64:  
    zsh-5.7.1-6.amzn2.0.1.x86_64  
    zsh-debuginfo-5.7.1-6.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2019-20044

Mitre: CVE-2019-20044