[SECURITY] [DLA 2079-1] otrs2 security update

Package : otrs2
Version : 3.3.18-1+deb8u13
CVE ID : CVE-2020-1765 CVE-2020-1766 CVE-2020-1767

Several vulnerabilities have been discovered in the otrs2 package that
may lead to unauthorized access, remote code execution and spoofing.

CVE-2020-1765

An improper control of parameters allows the spoofing of the from
fields of the following screens: AgentTicketCompose,
AgentTicketForward, AgentTicketBounce.

CVE-2020-1766

Due to improper handling of uploaded images it is possible in very
unlikely and rare conditions to force the agents browser to execute
malicious javascript from a special crafted SVG file rendered as
inline jpg file.

CVE-2020-1767

Unauthorized view of drafts, change the text completely and send it
in the name of draft owner. For the customer it will not be visible
that the message was sent by another agent.

For Debian 8 "Jessie", these problems have been fixed in version
3.3.18-1+deb8u13.

We recommend that you upgrade your otrs2 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