Package        : jruby
Version        : 1.5.6-9+deb8u1
CVE ID         : CVE-2018-1000074 CVE-2018-1000075 CVE-2018-1000076
                 CVE-2018-1000077 CVE-2018-1000078 CVE-2019-8321
                 CVE-2019-8322 CVE-2019-8323 CVE-2019-8324 CVE-2019-8325
Debian Bug     : 895778 925987


Multiple vulnerabilities have been discovered in jruby, Java
implementation of the Ruby programming language.

CVE-2018-1000074

    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

CVE-2018-1000075

    an infinite loop caused by negative size vulnerability in ruby gem
    package tar header that can result in a negative size could cause an
    infinite loop

CVE-2018-1000076

    Improper Verification of Cryptographic Signature vulnerability in
    package.rb that can result in a mis-signed gem could be installed,
    as the tarball would contain multiple gem signatures.

CVE-2018-1000077

    Improper Input Validation vulnerability in ruby gems specification
    homepage attribute that can result in a malicious gem could set an
    invalid homepage URL

CVE-2018-1000078

    Cross Site Scripting (XSS) vulnerability in gem server display of
    homepage attribute that can result in XSS. This attack appear to be
    exploitable via the victim must browse to a malicious gem on a
    vulnerable gem server

CVE-2019-8321

    Gem::UserInteraction#verbose calls say without escaping, escape
    sequence injection is possible

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

CVE-2019-8325

    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
1.5.6-9+deb8u1.

We recommend that you upgrade your jruby 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