Prerequisites/dependencies
VMWare for this methodology or a dedicated installation
platform if installed from ISO
Introduction
From Redline for March’s toolsmith to Redmine for
April’s, we’ll change pace from hacker space to the realm of secure project
management. Following is a shortened version of a much longer Redmine study
written for the SANS Reading Room as part
of graduate school requirements and released jointly with ISSA.
Security and collaborative project management should not
be exclusive. Software designed to support secure project management and
security-oriented projects can be both feature rich and hardened against
attacks. Web applications such as Redmine offer just such a solution and can
embrace the needs of project managers and security practitioners alike. Redmine
is project management and bug tracking software built on Ruby on Rails with a
focus on collaboration, functionality, and when enhanced with specific plugins,
can be configured securely to facilitate security-oriented projects. As a
productivity platform, Redmine allows convenient team workflow while embracing
the needs of virtual or mobile project members with a focus on socially
oriented processes. We’ll explore the secure implementation and configuration
of a Redmine server, and then transition into step-by-step details for managing
a real world web application penetration testing project using Redmine. This
will include the distribution of a virtual machine ready-built for real world
use during such projects, pre-configured with a project template based on
workflow in the SANS 542 Web Application Penetration Testing course.
From the TurnKey Redmine Web page: “Redmine is a Rails
web application that provides integrated project management features, issue
tracking, and support for multiple version control programs. It includes
calendar and Gantt charts to aid visual representation of projects and their
deadlines. It also features multi-project support, role based access control, a
per-project wiki, and project forums”.
Additionally, a tool such as Redmine allows the convergence of software and
security testing. As a software configuration management (SCM) tool, Redmine is
ideally suited to projects related to software development. That said, the
security expertise required to security test software needs equal consideration
and project management. “Sometimes security, or pen-testers for short - work on
the same test team as functionality testers; other times, pen-testers work as
security consultants and are hired by the software development company to
perform security tests”[1].
Regardless of who solicits the use of pen-testers, the related pen-test is a
project, and Redmine is the ideal application to provide the agile, flexible
platform pen-testers need to coordinate their efforts with the help of a PM or
team lead.
Installation
Redmine installation and configuration using a TurnKey
Linux Redmine appliance built on a Debian-based Linux distribution, is
reasonably straightforward. Your ability to install a Linux operating system
from an ISO file on a dedicated machine, or configuring a VMware virtual
machine is assumed. It is also assumed you have control of or access to an Active
Directory domain for LDAP authentication to Redmine, as it allows for more
robust user management. As referenced later, the IP address of the Redmine
instance was 192.168.248.16 and 192.168.248.248 for the domain controller. The
stable version of the TurnKey virtual Redmine appliance (version 12) running on
a lean instance of Debian Squeeze (CLI only, no X11 GUI) via VMWare Workstation
9 was utilized for this research. Note, readers will find running the shell via
Putty or a client where you can cut and paste installation strings easier as
the VMWare tools aren’t effective without the GUI. This TurnKey Redmine
appliance relies on Passenger, a module for Apache that hosts Ruby on Rails
applications, and supports the use of SSL/TLS (configured by default) and
ModSecurity for better security.
As of this writing the current version of Redmine was
2.2.1 and will be described herein. The installed version of Redmine on the
TurnKey appliance is 1.4.4; this guidance will include its upgrade to Redmine
2.2.1.
First, download the Turnkey Linux VM appliance and open
it in VMWare. The first boot routine
will ask you to create passwords for the root account, the MySQL root user, and
the Redmine admin. When the routine completes you should be presented the
TurnKey Linux Configuration Console as seen in Figure 1.
 |
| FIGURE 1: TurnKey Linux Configuration Console |
In the Hardening section, the
process of disabling the services you don’t intend to use will be discussed.
Take a snapshot of the virtual machine at this point and name the snapshot Base
Install.
Update the Redmine version
from a command prompt on the Redmine server as follows:
1.
apt-get
update
2.
apt-get
upgrade
3.
apt-get
install locate
4.
updatedb
5.
cd
/var/www
6.
mv
redmine redmine -old
7.
hg
clone --updaterev 2.0-stable https://bitbucket.org/redmine/redmine-all redmine
8.
cp
redmine -old/config/database.yml redmine/config/database.yml
9.
cp -r
redmine-old/files/ redmine/files/
10.
chown
-R root:www-data /var/www/ redmine
11.
cd
redmine
12.
gem
install bundler
13.
gem
install test-unit
14.
bundle
install --without development test rmagick
15.
mkdir
public/plugin_assets
16.
rake
generate_secret_token
17.
rake
db:migrate RAILS_ENV=production
18.
chown
-R www-data:www-data files log tmp public/plugin_assets
19.
rake
redmine:plugins:migrate RAILS_ENV=production
20.
chmod
-R 755 files log/ tmp/ public/plugin_assets
21.
rake
tmp:cache:clear
22.
rake
tmp:sessions:clear
Run the script
/var/www/redmine/script/about to confirm the version upgrade.
LDAP authentication is
inherent to Redmine but requires a bit of setup. The example Active Directory
domain name utilized via a virtual Windows Server 2008 domain controller was
REDMINE. The user redminer was established as the service-like account utilized
by Redmine to access the directory. Do not user a domain administrator account
for this user. Should your Redmine instance be compromised so too then would be
your domain. Via your browser, as the Redmine admin user, navigate to
Administration then LDAP Authentication. Refer to the Redmine LDAP
Authentication page via the Redmine WIKI but refer to the following example configuration as
successfully utilized for this research seen in Figure 2.
|
| FIGURE 2: LDAP Configuration |
Select Save then, assuming a correct configuration, you should receive
indication of a successful connection when you click Test on the resulting
Authentication Modes page.
Refer to the SANS Reading
Room version regarding additional installation and hardening steps and don’t
skip! These are important:
·
Installation
o Pixel
Cookers theme for a streamlined, tech-centric look as well as the
o Email
settings
o Plugin
installation (Ldap Sync, Scrum2B, Screenshot, Monitoring & Controlling)
·
Hardening
o Disable
unnecessary services
o Tighten
down SSH
o Restrict
Redmine web access to HTTPS only
o Implement
UFW (the uncomplicated firewall)
Engaging With Redmine
Following is a step by step
description of a penetration testing engagement where Redmine is utilized to
provide project support for a team of three.
The first and most important
steps to undertake are the elimination of all unwanted permissions for the Non member and Anonymous roles. Login to Redmine as the admin user and select Administration | Roles and permissions | Non
member | Uncheck all | Save. Repeat this process for the Anonyomous roles. These steps will
ensure that you don’t inadvertently expose project data to those who don’t have
explicit permission to view it. Next, to add users for this project, select Administration | Groups to add a group called PenTesters. From Administration
| Users add three users with
appropriately defined login names pentester1 (Fred), pentester2 (Wilma),
pentester3 (Barney), and pentestpm (BamBam) and add them to the PenTesters
group. Remember these users need to also have been created in the domain you’re
utilizing for LDAP authentication. Via the Administration
menu, under Projects, create a
project called Web Application Pentest.
The activities related to this project are drawn directly from tasks outlined
in the SANS 542: Web App Penetration
Testing and Ethical Hacking course as well as the Samurai Web Testing
Framework. Select
all Modules and Trackers for the project. You’ll note that Monitoring and Controlling by Project and Scrum2b are available as implemented during the installation phase
described earlier. These plugins will be described in more detail as their use
is inherent to agile project management for projects such as penetration
testing.
Redmine allows the creation
of subprojects as well; the Web Application Pentest project should be divided
into four subprojects named as follows: 1-Recon,
2-Mapping, 3-Discovery, and 4-Exploitation.
Add each of them from Redmine Web Application Pentest project page and remember
to enable all Modules and Trackers.
Add the user accounts for the
three penetration testers and the project PM user as project and subproject
members via the Members tab as seen in Figure 3.
 |
| FIGURE 3: Pen-test Project Members |
Return to the project
overview, select 1-Recon under
subprojects, and add a new issue. File a bug for each recon phase task you’d
like completed, with the applicable start and due dates. You can upload related
files, screenshots (thanks to the plugin installed earlier), and designate an
assignee, as well as watchers.
Under Settings for each project or subproject you define you can
establish issue categories. This is an ideal method by which to establish
penetration testing activities for each subproject. As an example, the recon
phase of a web application penetration test includes general recon along with
DNS and Whois lookups, search engine analysis, social network analysis, and
location analysis. Establishing each of these as issues categories will then
allow bugs (tasks) to be filed specific to each category. Each bug can in turn
be assigned a pen-tester with start and end dates, along with files that might
be useful to complete the task. Location analysis could include gleaning
location data from victim Tweets as described in Violent Python[2]. Twitter
provides an API to developers which allows information gathering about
individuals (potential penetration test targets). A script from Violent Python
to help in this information gathering can be uploaded into the Redmine bug,
Location data from Tweets as seen in Figure 4.
 |
| FIGURE 4: Bug (task) assigned to Fred, with helper code |
As bugs are added, assigned,
and/or updated, if configured to communicate verbosely, Redmine will email
notices to the appropriate parties. The email as seen in Figure 5 was received
as a function of filing the bug in Figure 4.
 |
| FIGURE 5: Email notice for bug (task) filed |
This allows real-time
communication among penetration testers or any project participants defined in
your Redmine deployment. As pen-testers generate findings, they can be uploaded
to the associated bug, and if versioning is required, managed via the Mercurial
SCM offering as described during installation.
Bug status can be tracked as New, In
Progress, Resolved, Feedback, and Closed or Rejected, and
each bug can be assigned a priority and estimated time. As completed, actual
time spent on each bug can be tracked too. Overall project time allotments as
defined in the bug then track quite nicely via the Redmine Gantt functionality
as seen in Figure 6.
 |
| FIGURE 6: Redmine Gantt functionality |
Scrum2b
The concept of agile software
development has, over time, been applied directly to project management.
Consider the use of Scrum methodology as part of agile project management.
According to Agile Project Management with Scrum, “the heart of Scrum lies in
the iteration. The team takes a look at the requirements, considers the
available technology, and evaluates its own skills and capabilities. It then
collectively determines how to build the functionality, modifying its approach
daily as it encounters new complexities, difficulties, and surprises. The team
figures out what needs to be done and selects the best way to do it. This
creative process is the heart of the Scrum’s productivity”[3]. These
creative processes, assessment of capabilities, and changing complexities and
surprises are also inherent to any penetration test and as such, the agile
project management framework is an ideal way to coordinate pen-test projects.
The Scrum2b plugin for Redmine is well suited to answer this calling. If each
phase of the pen-test is considered a sprint as defined by the Scrum process,
the planning and awareness necessary to support the sprint is essential. The
Scrum2b interface is a virtual Scrum Board that allows project participants to
track activities by bug and members while editing the bug on the fly with the
appropriate permission. The pentestpm user, as project manager, could adjust
task’s percentage of completion right from Scrum2b using the time slider.
 |
| FIGURE 7: Scrum2b Scrum Board for pen-testers |
If the assignee needs to jump
right to the bug, the plugin is fully hyperlink enabled. The Scrum Board allows
filtering the view by members and issues. New issues can also be added right
from the Scrum Board.
Monitoring & Controlling
All projects require the
right balance of monitoring and controlling, and penetration tests are no
exception. The Monitoring and Controlling Project Work process includes
“gathering, recording, and documenting project information that provides
project status, measurements of progress, and forecasting to update cost and
schedule information that is reported to stakeholders, project team members,
management, and others”[4]. The
Monitoring & Controlling plugin for Redmine shines in this capacity.
Established as a convenient left-pane menu item with the Pixel Cookers theme,
this plugin creates a dashboard for project data organized by Tasks Management,
Time Management, and Human Resource Management. Tasks Management tracks Tasks
by Status, Tasks by Category, and Task Management (manageability). Applied
again to the context of a pen-test project, Figure 8 represents the Recon phase
of a pen-test.
 |
| FIGURE 8: Monitoring & Controlling Tasks Management |
Refer again to the SANS
Reading Room version, page 17, for more regarding Time & Human Resources Management
with the Redmine Monitoring & Controlling plugin.
In Conclusion
Project management includes a certain amount of tedium, but
Redmine configured with the aforementioned plugins allows for a refreshing,
dynamic approach to the overall secure project management lifecycle. While no
system is ever absolutely secure (a serious Ruby on Rails SQL injection flaw
was disclosed as this paper was written), the appropriate hardening steps can
help ensure enhanced protection. Steady maintenance and diligence will also
serve you well. The convenience of an implementation such as TurnKey Redmine
makes keeping the entire system up to date quite easy.
A version of a TurnKey Redmine virtual machine as
discussed here will be made available to readers via the HolisticInfoSec
Skydrive. This
instance will include a web application project template, with predefined
subprojects, issue categories and bugs, again as defined in the SANS 542
course. Readers will need only create users, assign dates and members, and
establish access to an LDAP service.
Ping me via email if you have questions or suggestions
for topic via russ at holisticinfosec dot org or hit me on Twitter @holisticinfosec.
Cheers…until next month.
References
[1] Gallagher, Jeffries, and Landauer (2006). Hunting
Security Bugs, Redmond, WA:
Microsoft Press.
[2]
O'Connor, T. (2013). Violent python. (p. 229). Walthm, MA: Syngress.
[3]
Schwaber, K. (2004). Agile project management with scrum.
[4]
Heldman, K. (2009). Pmp: Project management professional exam study guide.
(Fifth ed.). Indianapolis, IN: Sybex.
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