Medium: ruby

Issue Overview:

A flaw was found in ruby, where the date object was found to be vulnerable to a regular expression denial of service (ReDoS) during the parsing of dates. This flaw allows an attacker to hang a ruby application by providing a specially crafted date string. The highest threat to this vulnerability is system availability. (CVE-2021-41817)

Affected Packages:

ruby

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 ruby to update your system.

New Packages:

aarch64:  
    ruby-2.0.0.648-36.amzn2.0.6.aarch64  
    ruby-devel-2.0.0.648-36.amzn2.0.6.aarch64  
    ruby-libs-2.0.0.648-36.amzn2.0.6.aarch64  
    rubygem-bigdecimal-1.2.0-36.amzn2.0.6.aarch64  
    rubygem-io-console-0.4.2-36.amzn2.0.6.aarch64  
    rubygem-json-1.7.7-36.amzn2.0.6.aarch64  
    rubygem-psych-2.0.0-36.amzn2.0.6.aarch64  
    ruby-tcltk-2.0.0.648-36.amzn2.0.6.aarch64  
    ruby-debuginfo-2.0.0.648-36.amzn2.0.6.aarch64  
  
i686:  
    ruby-2.0.0.648-36.amzn2.0.6.i686  
    ruby-devel-2.0.0.648-36.amzn2.0.6.i686  
    ruby-libs-2.0.0.648-36.amzn2.0.6.i686  
    rubygem-bigdecimal-1.2.0-36.amzn2.0.6.i686  
    rubygem-io-console-0.4.2-36.amzn2.0.6.i686  
    rubygem-json-1.7.7-36.amzn2.0.6.i686  
    rubygem-psych-2.0.0-36.amzn2.0.6.i686  
    ruby-tcltk-2.0.0.648-36.amzn2.0.6.i686  
    ruby-debuginfo-2.0.0.648-36.amzn2.0.6.i686  
  
noarch:  
    rubygems-2.0.14.1-36.amzn2.0.6.noarch  
    rubygems-devel-2.0.14.1-36.amzn2.0.6.noarch  
    rubygem-rake-0.9.6-36.amzn2.0.6.noarch  
    ruby-irb-2.0.0.648-36.amzn2.0.6.noarch  
    rubygem-rdoc-4.0.0-36.amzn2.0.6.noarch  
    ruby-doc-2.0.0.648-36.amzn2.0.6.noarch  
    rubygem-minitest-4.3.2-36.amzn2.0.6.noarch  
  
src:  
    ruby-2.0.0.648-36.amzn2.0.6.src  
  
x86_64:  
    ruby-2.0.0.648-36.amzn2.0.6.x86_64  
    ruby-devel-2.0.0.648-36.amzn2.0.6.x86_64  
    ruby-libs-2.0.0.648-36.amzn2.0.6.x86_64  
    rubygem-bigdecimal-1.2.0-36.amzn2.0.6.x86_64  
    rubygem-io-console-0.4.2-36.amzn2.0.6.x86_64  
    rubygem-json-1.7.7-36.amzn2.0.6.x86_64  
    rubygem-psych-2.0.0-36.amzn2.0.6.x86_64  
    ruby-tcltk-2.0.0.648-36.amzn2.0.6.x86_64  
    ruby-debuginfo-2.0.0.648-36.amzn2.0.6.x86_64  

Additional References

Red Hat: CVE-2021-41817

Mitre: CVE-2021-41817