Medium: ruby

Issue Overview:

An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port. This potentially makes curl extract information about services that are otherwise private and not disclosed (e.g., the attacker can conduct port scans and service banner extractions). (CVE-2021-31810)

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.amzn2.0.9.aarch64  
    ruby-devel-2.0.0.648-36.amzn2.0.9.aarch64  
    ruby-libs-2.0.0.648-36.amzn2.0.9.aarch64  
    rubygem-bigdecimal-1.2.0-36.amzn2.0.9.aarch64  
    rubygem-io-console-0.4.2-36.amzn2.0.9.aarch64  
    rubygem-json-1.7.7-36.amzn2.0.9.aarch64  
    rubygem-psych-2.0.0-36.amzn2.0.9.aarch64  
    ruby-tcltk-2.0.0.648-36.amzn2.0.9.aarch64  
    ruby-debuginfo-2.0.0.648-36.amzn2.0.9.aarch64  
  
i686:  
    ruby-2.0.0.648-36.amzn2.0.9.i686  
    ruby-devel-2.0.0.648-36.amzn2.0.9.i686  
    ruby-libs-2.0.0.648-36.amzn2.0.9.i686  
    rubygem-bigdecimal-1.2.0-36.amzn2.0.9.i686  
    rubygem-io-console-0.4.2-36.amzn2.0.9.i686  
    rubygem-json-1.7.7-36.amzn2.0.9.i686  
    rubygem-psych-2.0.0-36.amzn2.0.9.i686  
    ruby-tcltk-2.0.0.648-36.amzn2.0.9.i686  
    ruby-debuginfo-2.0.0.648-36.amzn2.0.9.i686  
  
noarch:  
    rubygems-2.0.14.1-36.amzn2.0.9.noarch  
    rubygems-devel-2.0.14.1-36.amzn2.0.9.noarch  
    rubygem-rake-0.9.6-36.amzn2.0.9.noarch  
    ruby-irb-2.0.0.648-36.amzn2.0.9.noarch  
    rubygem-rdoc-4.0.0-36.amzn2.0.9.noarch  
    ruby-doc-2.0.0.648-36.amzn2.0.9.noarch  
    rubygem-minitest-4.3.2-36.amzn2.0.9.noarch  
  
src:  
    ruby-2.0.0.648-36.amzn2.0.9.src  
  
x86_64:  
    ruby-2.0.0.648-36.amzn2.0.9.x86_64  
    ruby-devel-2.0.0.648-36.amzn2.0.9.x86_64  
    ruby-libs-2.0.0.648-36.amzn2.0.9.x86_64  
    rubygem-bigdecimal-1.2.0-36.amzn2.0.9.x86_64  
    rubygem-io-console-0.4.2-36.amzn2.0.9.x86_64  
    rubygem-json-1.7.7-36.amzn2.0.9.x86_64  
    rubygem-psych-2.0.0-36.amzn2.0.9.x86_64  
    ruby-tcltk-2.0.0.648-36.amzn2.0.9.x86_64  
    ruby-debuginfo-2.0.0.648-36.amzn2.0.9.x86_64  

Additional References

Red Hat: CVE-2021-31810

Mitre: CVE-2021-31810