Debian 8: DLA-1480-1 High: Ruby2.1 Code Execution and Data Issues

Type confusion exists in _cancel_eval Ruby's TclTkIp class
method. Attacker passing different type of object than String as
"retval" argument can cause arbitrary code execution.

CVE-2018-1000073

RubyGems contains a Directory Traversal vulnerability in
install_location function of package.rb that can result in path
traversal when writing to a symlinked basedir outside of the root.

CVE-2018-1000074

RubyGems contains a Deserialization of Untrusted Data
vulnerability in owner command that can result in code
execution. This attack appear to be exploitable via victim must
run the `gem owner` command on a gem with a specially crafted YAML
file.

For Debian 8 "Jessie", these problems have been fixed in version
2.1.5-2+deb8u5.

We recommend that you upgrade your ruby2.1 packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS