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[Launchpad Bug Tracker <1668871@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package kde4libs - 4:4.13.3-0ubuntu0.4

---------------
kde4libs (4:4.13.3-0ubuntu0.4) trusty-security; urgency=medium

  * SECURITY UPDATE: information leak via crafted PAC file (LP: #1668871)
    - debian/patches/CVE-2017-6410.patch: sanitize URLs in
      kio/misc/kpac/script.cpp.
    - CVE-2017-6410

 -- Marc Deslauriers <marc.deslauriers@xxxxxxxxxx>  Wed, 08 Mar 2017
10:25:45 -0500

** Changed in: kde4libs (Ubuntu Trusty)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1668871

Title:
  kio: Information Leak when accessing https when using a malicious PAC
  file

Status in kde4libs package in Ubuntu:
  Fix Released
Status in kio package in Ubuntu:
  Fix Released
Status in kde4libs source package in Trusty:
  Fix Released
Status in kde4libs source package in Xenial:
  Fix Released
Status in kio source package in Xenial:
  Fix Released
Status in kde4libs source package in Yakkety:
  Fix Released
Status in kio source package in Yakkety:
  Fix Released
Status in kde4libs source package in Zesty:
  Fix Released
Status in kio source package in Zesty:
  Fix Released

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

  Title:          kio: Information Leak when accessing https when using a malicious PAC file
  Risk Rating:    Medium
  CVE:            TBC
  Versions:       kio < 5.32, kdelibs < 4.14.30
  Date:           28 February 2017

  
  Overview
  ========
  Using a malicious PAC file, and then using exfiltration methods in the PAC
  function FindProxyForURL() enables the attacker to expose full https URLs.

  This is a security issue since https URLs may contain sensitive
  information in the URL authentication part (user:password@host), and in the
  path and the query (e.g. access tokens).

  This attack can be carried out remotely (over the LAN) since proxy settings
  allow “Detect Proxy Configuration Automatically”.
  This setting uses WPAD to retrieve the PAC file, and an attacker who has access
  to the victim’s LAN can interfere with the WPAD protocols (DHCP/DNS+HTTP)
  and inject his/her own malicious PAC instead of the legitimate one.

  Solution
  ========
  Update to kio >= 5.32 and kdelibs >= 4.14.30 (when released)

  Or apply the following patches:
      kio: https://commits.kde.org/kio/f9d0cb47cf94e209f6171ac0e8d774e68156a6e4
  kdelibs: https://commits.kde.org/kdelibs/1804c2fde7bf4e432c6cf5bb8cce5701c7010559

  Credits
  =======
  Thanks to Safebreach Labs researchers Itzik Kotler, Yonatan Fridburg
  and Amit Klein.

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