The following updates has been released for Debian GNU/Linux 8 LTS:

DLA 1476-1: dropbear security update
DLA 1479-1: twitter-bootstrap3 security update
DLA 1480-1: ruby2.1 security update

DLA 1476-1: dropbear security update

Package : dropbear
Version : 2014.65-1+deb8u3
CVE ID : CVE-2018-15599
Debian Bug : 906890

A vulnerability in dropbear, a lightweight SSH2 server and client, making it
possible to guess valid usernames has been found:

CVE-2018-15599:

The recv_msg_userauth_request function in svr-auth.c in is prone
to a user enumeration vulnerability, similar to CVE-2018-15473 in OpenSSH.

For Debian 8 "Jessie", this problem has been fixed in version
2014.65-1+deb8u3.

We recommend that you upgrade your dropbear 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

DLA 1479-1: twitter-bootstrap3 security update

Package : twitter-bootstrap3
Version : 3.2.0+dfsg-1+deb7u1
CVE ID : CVE-2018-14040
Debian Bug : 907414

The Bootstrap framework was found to have cross-site scripting
vulnerabilities in the "collapse" plugin.

For Debian 8 "Jessie", this problem has been fixed in version
3.2.0+dfsg-1+deb7u1.

We recommend that you upgrade your twitter-bootstrap3 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

DLA 1480-1: ruby2.1 security update

Package : ruby2.1
Version : 2.1.5-2+deb8u5
CVE ID : CVE-2016-2337 CVE-2018-1000073 CVE-2018-1000074
Debian Bug : 895778 851161

Several vulnerabilities were discovered in Ruby 2.1.

CVE-2016-2337

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