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List:       full-disclosure
Subject:    [FD] CVE-2015-4674 - TimeDoctor autoupdate over plain-HTTP
From:       Fernando_Muñoz <fernando () null-life ! com>
Date:       2015-06-29 23:49:20
Message-ID: CAEr-gPHX7eQQGW3VUyYUs_3UehhdKurcCQEM3QgUwoiiGtmvdQ () mail ! gmail ! com
[Download RAW message or body]

TimeDoctor claims to be a software that helps to improve the
productivity of teams, reduce time spent on distractions [1]

Vulnerability:
TimeDoctor autoupdate feature downloads and executes files over plain
HTTP and doesn't perform any check with the files. An attacker with
MITM capabilities (i.e., when user connects to a public wifi) could
override the Timedoctor subdomain and then execute custom binaries on
the machine where the application is running.

The update mechanisms first downloads update.xml [2] which has
the version number, url and a filename for the new
installer.

Credit:
Fernando Muñoz

CVE:
CVE-2015-4674

Version tested:
TimeDoctor Pro 1.4.72.3 for Windows
Other editions/versions maybe affected.

Demo video:
https://www.youtube.com/watch?v=t1JM4DaR130

Vendor acknowledged the issue on Jun 18 and a new version should be
available today (Jun 29).


[1] https://www.timedoctor.com/about-us.html
[2] http://updates.timedoctor.com/download/_production/tdpro/windows/update.xml

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