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[Launchpad Bug Tracker <1630700@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package kcoreaddons - 5.26.0-0ubuntu2

---------------
kcoreaddons (5.26.0-0ubuntu2) yakkety; urgency=medium

  * SECURITY UPDATE: KMail - HTML injection in plain text viewer
    (LP: #1630700)
    - debian/patches/0001-Fix-very-old-bug-when-we-remove-space-in-
      url-as-foo-.patch: Code added by upstream to fix another bug,
      but needs to be applied in advance of patch 0002
    - debian/patches/0002-Don-t-convert-as-url-an-url-which-has-a.patch:
      Fixes CVE-2016-7966
    Patches cherrypicked from Debian:
    https://anonscm.debian.org/git/pkg-kde/frameworks/kcoreaddons.git
    Commit: ab7258dd8a87668ba63c585a69f41f291254aa43
    Many thanks to Sandro Knauß for these patches

 -- Clive Johnston <clivejo@xxxxxxxxxxx>  Fri, 07 Oct 2016 23:57:19
+0100

** Changed in: kcoreaddons (Ubuntu Yakkety)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1630700

Title:
  CVE - KMail - HTML injection in plain text viewer

Status in kcoreaddons package in Ubuntu:
  Fix Released
Status in kcoreaddons source package in Precise:
  In Progress
Status in kcoreaddons source package in Trusty:
  New
Status in kcoreaddons source package in Xenial:
  New
Status in kcoreaddons source package in Yakkety:
  Fix Released

Bug description:
  KDE Project Security Advisory
  =============================

  Title:             KMail: HTML injection
  Risk Rating:  Important
  CVE:              #TODO
  Platforms:      All
  Versions:       kmail >= 4.4.0
  Author:         #TODO
  Date:            #TODO

  Overview
  ========

  Through a malicious URL that contained a quote character it
  was possible to inject HTML code in KMail's plain text viewer.
  Due to the parser used on the URL it was not possible to include
  the equal sign (=) or a space into the injected HTML, which greatly
  reduces the available HTML functionality. Although it is possible
  to include an HTML comment indicator to hide content.

  Impact
  ======

  An unauthenticated attacker can send out mails with malicious content
  that breaks KMail's plain text HTML escape logic. Due to the limitations
  of the provided HTML in itself it might not be serious. But as a way
  to break out of KMail's restricted Plain text mode this might open
  the way to the exploitation of other vulnerabilities in the HTML viewer
  code, which is disabled by default.

  Workaround
  ==========

  None.

  Solution
  ========

  For KDE Frameworks based releases of KMail apply the following patch to
  kcoreaddons:

  https://quickgit.kde.org/?
  p=kcoreaddons.git&a=commitdiff&h=96e562d9138c100498da38e4c5b4091a226dde12

  For KDE 4 apply the following patch:
  https://quickgit.kde.org/?
  p=kdepimlibs.git&a=commitdiff&h=176fee25ca79145ab5c8e2275d248f1a46a8d8cf

  Credits
  =======

  Thanks to Roland Tapken for reporting this issue, Andre Heinecke from
  Intevation GmbH for analysing the problems and Laurent Montel for
  fixing this issue.

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