Amazon Linux 1 Security Advisory: ALAS-2019-1255
Advisory Release Date: 2019-08-07 22:58 Pacific
Advisory Updated Date: 2019-08-12 18:13 Pacific
FAQs regarding Amazon Linux ALAS/CVE Severity
An issue was discovered in RubyGems. 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. 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. Since Gem::UserInteraction#verbose calls say without escaping, escape sequence injection is possible.(CVE-2019-8321)
A Directory Traversal issue was discovered in RubyGems. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.(CVE-2019-8320)
An issue was discovered in RubyGems. 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)
An issue was discovered in RubyGems. 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)
Affected Packages:
ruby20, ruby21, ruby24
Issue Correction:
Run yum update ruby20 to update your system.
Run yum update ruby21 to update your system.
Run yum update ruby24 to update your system.
i686:
ruby20-libs-2.0.0.648-1.32.amzn1.i686
ruby20-debuginfo-2.0.0.648-1.32.amzn1.i686
rubygem20-bigdecimal-1.2.0-1.32.amzn1.i686
ruby20-devel-2.0.0.648-1.32.amzn1.i686
rubygem20-psych-2.0.0-1.32.amzn1.i686
rubygem20-io-console-0.4.2-1.32.amzn1.i686
ruby20-2.0.0.648-1.32.amzn1.i686
ruby21-2.1.9-1.22.amzn1.i686
rubygem21-bigdecimal-1.2.4-1.22.amzn1.i686
ruby21-debuginfo-2.1.9-1.22.amzn1.i686
rubygem21-io-console-0.4.3-1.22.amzn1.i686
ruby21-devel-2.1.9-1.22.amzn1.i686
rubygem21-psych-2.0.5-1.22.amzn1.i686
ruby21-libs-2.1.9-1.22.amzn1.i686
ruby24-2.4.5-1.30.11.amzn1.i686
rubygem24-json-2.0.4-1.30.11.amzn1.i686
rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.i686
ruby24-debuginfo-2.4.5-1.30.11.amzn1.i686
rubygem24-io-console-0.4.6-1.30.11.amzn1.i686
rubygem24-psych-2.2.2-1.30.11.amzn1.i686
ruby24-libs-2.4.5-1.30.11.amzn1.i686
rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.i686
ruby24-devel-2.4.5-1.30.11.amzn1.i686
noarch:
ruby20-irb-2.0.0.648-1.32.amzn1.noarch
ruby20-doc-2.0.0.648-1.32.amzn1.noarch
rubygems20-devel-2.0.14.1-1.32.amzn1.noarch
rubygems20-2.0.14.1-1.32.amzn1.noarch
ruby21-irb-2.1.9-1.22.amzn1.noarch
rubygems21-devel-2.2.5-1.22.amzn1.noarch
ruby21-doc-2.1.9-1.22.amzn1.noarch
rubygems21-2.2.5-1.22.amzn1.noarch
rubygems24-2.6.14.3-1.30.11.amzn1.noarch
rubygem24-did_you_mean-1.1.0-1.30.11.amzn1.noarch
rubygems24-devel-2.6.14.3-1.30.11.amzn1.noarch
ruby24-doc-2.4.5-1.30.11.amzn1.noarch
ruby24-irb-2.4.5-1.30.11.amzn1.noarch
src:
ruby20-2.0.0.648-1.32.amzn1.src
ruby21-2.1.9-1.22.amzn1.src
ruby24-2.4.5-1.30.11.amzn1.src
x86_64:
ruby20-devel-2.0.0.648-1.32.amzn1.x86_64
rubygem20-bigdecimal-1.2.0-1.32.amzn1.x86_64
ruby20-debuginfo-2.0.0.648-1.32.amzn1.x86_64
rubygem20-io-console-0.4.2-1.32.amzn1.x86_64
ruby20-2.0.0.648-1.32.amzn1.x86_64
rubygem20-psych-2.0.0-1.32.amzn1.x86_64
ruby20-libs-2.0.0.648-1.32.amzn1.x86_64
rubygem21-psych-2.0.5-1.22.amzn1.x86_64
ruby21-devel-2.1.9-1.22.amzn1.x86_64
ruby21-libs-2.1.9-1.22.amzn1.x86_64
ruby21-debuginfo-2.1.9-1.22.amzn1.x86_64
rubygem21-bigdecimal-1.2.4-1.22.amzn1.x86_64
ruby21-2.1.9-1.22.amzn1.x86_64
rubygem21-io-console-0.4.3-1.22.amzn1.x86_64
rubygem24-json-2.0.4-1.30.11.amzn1.x86_64
ruby24-devel-2.4.5-1.30.11.amzn1.x86_64
ruby24-debuginfo-2.4.5-1.30.11.amzn1.x86_64
rubygem24-bigdecimal-1.3.2-1.30.11.amzn1.x86_64
rubygem24-io-console-0.4.6-1.30.11.amzn1.x86_64
ruby24-2.4.5-1.30.11.amzn1.x86_64
ruby24-libs-2.4.5-1.30.11.amzn1.x86_64
rubygem24-xmlrpc-0.2.1-1.30.11.amzn1.x86_64
rubygem24-psych-2.2.2-1.30.11.amzn1.x86_64