Package        : ruby2.1
Version        : 2.1.5-2+deb8u7
CVE ID         : CVE-2019-8320 CVE-2019-8322 CVE-2019-8323 CVE-2019-8324
                 CVE-2019-8325


Several vulnerabilities have been discovered in rubygems embedded in
ruby2.1, the interpreted scripting language.

CVE-2019-8320

    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.

CVE-2019-8322

    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-2019-8323

    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-2019-8324

    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-2019-8325

    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.)

For Debian 8 "Jessie", these problems have been fixed in version
2.1.5-2+deb8u7.

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