Medium: ruby

Issue Overview:

The JSON gem through 2.2.0 for Ruby, as used in Ruby 2.4 through 2.4.9, 2.5 through 2.5.7, and 2.6 through 2.6.5, has an Unsafe Object Creation Vulnerability. This is quite similar to CVE-2013-0269, but does not rely on poor garbage-collection behavior within Ruby. Specifically, use of JSON parsing methods can lead to creation of a malicious object within the interpreter, with adverse effects that are application-dependent. (CVE-2020-10663)

An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack. (CVE-2020-25613)

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.amzn2.0.2.aarch64  
    ruby-devel-2.0.0.648-36.amzn2.0.2.aarch64  
    ruby-libs-2.0.0.648-36.amzn2.0.2.aarch64  
    rubygem-bigdecimal-1.2.0-36.amzn2.0.2.aarch64  
    rubygem-io-console-0.4.2-36.amzn2.0.2.aarch64  
    rubygem-json-1.7.7-36.amzn2.0.2.aarch64  
    rubygem-psych-2.0.0-36.amzn2.0.2.aarch64  
    ruby-tcltk-2.0.0.648-36.amzn2.0.2.aarch64  
    ruby-debuginfo-2.0.0.648-36.amzn2.0.2.aarch64  
  
i686:  
    ruby-2.0.0.648-36.amzn2.0.2.i686  
    ruby-devel-2.0.0.648-36.amzn2.0.2.i686  
    ruby-libs-2.0.0.648-36.amzn2.0.2.i686  
    rubygem-bigdecimal-1.2.0-36.amzn2.0.2.i686  
    rubygem-io-console-0.4.2-36.amzn2.0.2.i686  
    rubygem-json-1.7.7-36.amzn2.0.2.i686  
    rubygem-psych-2.0.0-36.amzn2.0.2.i686  
    ruby-tcltk-2.0.0.648-36.amzn2.0.2.i686  
    ruby-debuginfo-2.0.0.648-36.amzn2.0.2.i686  
  
noarch:  
    rubygems-2.0.14.1-36.amzn2.0.2.noarch  
    rubygems-devel-2.0.14.1-36.amzn2.0.2.noarch  
    rubygem-rake-0.9.6-36.amzn2.0.2.noarch  
    ruby-irb-2.0.0.648-36.amzn2.0.2.noarch  
    rubygem-rdoc-4.0.0-36.amzn2.0.2.noarch  
    ruby-doc-2.0.0.648-36.amzn2.0.2.noarch  
    rubygem-minitest-4.3.2-36.amzn2.0.2.noarch  
  
src:  
    ruby-2.0.0.648-36.amzn2.0.2.src  
  
x86_64:  
    ruby-2.0.0.648-36.amzn2.0.2.x86_64  
    ruby-devel-2.0.0.648-36.amzn2.0.2.x86_64  
    ruby-libs-2.0.0.648-36.amzn2.0.2.x86_64  
    rubygem-bigdecimal-1.2.0-36.amzn2.0.2.x86_64  
    rubygem-io-console-0.4.2-36.amzn2.0.2.x86_64  
    rubygem-json-1.7.7-36.amzn2.0.2.x86_64  
    rubygem-psych-2.0.0-36.amzn2.0.2.x86_64  
    ruby-tcltk-2.0.0.648-36.amzn2.0.2.x86_64  
    ruby-debuginfo-2.0.0.648-36.amzn2.0.2.x86_64  

Additional References

Red Hat: CVE-2020-10663, CVE-2020-25613, CVE-2021-31799

Mitre: CVE-2020-10663, CVE-2020-25613, CVE-2021-31799