ALAS2-2019-1249

Amazon Linux 2 Security Advisory: ALAS-2019-1249
Advisory Release Date: 2019-07-18 18:14 Pacific
Advisory Updated Date: 2019-07-22 16:49 Pacific
Severity: Important
Issue Overview:

An issue was discovered in RubyGems 2.6 and later through 3.0.2. The gem owner command outputs the contents of the API response directly to stdout. Therefore, if the response is crafted, escape sequence injection may occur. (CVE-2019-8322)

An issue was discovered in RubyGems 2.6 and later through 3.0.2. Gem::GemcutterUtilities#with_response may output the API response to stdout as it is. Therefore, if the API side modifies the response, escape sequence injection may occur. (CVE-2019-8323)

An issue was discovered in RubyGems 2.6 and later through 3.0.2. Since Gem::CommandManager#run calls alert_error without escaping, escape sequence injection is possible. (There are many ways to cause an error.) (CVE-2019-8325)

An issue was discovered in RubyGems 2.6 and later through 3.0.2. A crafted gem with a multi-line name is not handled correctly. Therefore, an attacker could inject arbitrary code to the stub line of gemspec, which is eval-ed by code in ensure_loadable_spec during the preinstall check. (CVE-2019-8324)


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-2.0.0.648-35.amzn2.0.1.aarch64
    ruby-devel-2.0.0.648-35.amzn2.0.1.aarch64
    ruby-libs-2.0.0.648-35.amzn2.0.1.aarch64
    rubygem-bigdecimal-1.2.0-35.amzn2.0.1.aarch64
    rubygem-io-console-0.4.2-35.amzn2.0.1.aarch64
    rubygem-json-1.7.7-35.amzn2.0.1.aarch64
    rubygem-psych-2.0.0-35.amzn2.0.1.aarch64
    ruby-tcltk-2.0.0.648-35.amzn2.0.1.aarch64
    ruby-debuginfo-2.0.0.648-35.amzn2.0.1.aarch64

i686:
    ruby-2.0.0.648-35.amzn2.0.1.i686
    ruby-devel-2.0.0.648-35.amzn2.0.1.i686
    ruby-libs-2.0.0.648-35.amzn2.0.1.i686
    rubygem-bigdecimal-1.2.0-35.amzn2.0.1.i686
    rubygem-io-console-0.4.2-35.amzn2.0.1.i686
    rubygem-json-1.7.7-35.amzn2.0.1.i686
    rubygem-psych-2.0.0-35.amzn2.0.1.i686
    ruby-tcltk-2.0.0.648-35.amzn2.0.1.i686
    ruby-debuginfo-2.0.0.648-35.amzn2.0.1.i686

noarch:
    rubygems-2.0.14.1-35.amzn2.0.1.noarch
    rubygems-devel-2.0.14.1-35.amzn2.0.1.noarch
    rubygem-rake-0.9.6-35.amzn2.0.1.noarch
    ruby-irb-2.0.0.648-35.amzn2.0.1.noarch
    rubygem-rdoc-4.0.0-35.amzn2.0.1.noarch
    ruby-doc-2.0.0.648-35.amzn2.0.1.noarch
    rubygem-minitest-4.3.2-35.amzn2.0.1.noarch

src:
    ruby-2.0.0.648-35.amzn2.0.1.src

x86_64:
    ruby-2.0.0.648-35.amzn2.0.1.x86_64
    ruby-devel-2.0.0.648-35.amzn2.0.1.x86_64
    ruby-libs-2.0.0.648-35.amzn2.0.1.x86_64
    rubygem-bigdecimal-1.2.0-35.amzn2.0.1.x86_64
    rubygem-io-console-0.4.2-35.amzn2.0.1.x86_64
    rubygem-json-1.7.7-35.amzn2.0.1.x86_64
    rubygem-psych-2.0.0-35.amzn2.0.1.x86_64
    ruby-tcltk-2.0.0.648-35.amzn2.0.1.x86_64
    ruby-debuginfo-2.0.0.648-35.amzn2.0.1.x86_64

Additional References

Red Hat: CVE-2019-8322, CVE-2019-8323, CVE-2019-8324, CVE-2019-8325

Mitre: CVE-2019-8322, CVE-2019-8323, CVE-2019-8324, CVE-2019-8325