Overview sectrain is a program to illustrate some of the security issues common in applications such as XSS and buffer overflows along with how to stop them. Currently this shows example in PHP and Python.
Still to be done is include javascript, SQLi and C++ buffer overflows, should be done shortly.
Installation
The simplest way to install sectrain is to use the snap
sudo snap install sectrain
Web Starting
sectrain startweb
Web Stopping
sectrain stopweb
Web Usage
Open your browser to your host on port 1984, then browse choose the secure or insecure links. Try an exploit such as :
"><script>alert('xss');</script>
You will see how sanitizing the input/output helps solve these issues.
Python Buffer Overflows
There are two examples to look at, pybuffgood and pybuffbad, sending in too long of a string breaks it. Simple, but still a good way to illustrate the point.
sectrain pybuffbad abcdefghijkl
sectrain pybuffgood abcdefghijkl
Clearly more can be done, but this is just to aid in getting people interested in fixing their code.
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Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Snap can be installed from the command line on openSUSE Leap 15.x and Tumbleweed.
You need first add the snappy repository from the terminal. Choose the appropriate command depending on your installed openSUSE flavor.
Tumbleweed:
sudo zypper addrepo --refresh https://download.opensuse.org/repositories/system:/snappy/openSUSE_Tumbleweed snappy
Leap 15.x:
sudo zypper addrepo --refresh https://download.opensuse.org/repositories/system:/snappy/openSUSE_Leap_15.6 snappy
If needed, Swap out openSUSE_Leap_15. for, openSUSE_Leap_16.0 if you’re using a different version of openSUSE.
With the repository added, import its GPG key:
sudo zypper --gpg-auto-import-keys refresh
Finally, upgrade the package cache to include the new snappy repository:
sudo zypper dup --from snappy
Snap can now be installed with the following:
sudo zypper install snapd
You then need to either reboot, logout/login or source /etc/profile to have /snap/bin added to PATH.
Additionally, enable and start both the snapd and the snapd.apparmor services with the following commands:
sudo systemctl enable --now snapd
sudo systemctl enable --now snapd.apparmor
To install sectrain, simply use the following command:
sudo snap install sectrain
Browse and find snaps from the convenience of your desktop using the snap store snap.
Interested to find out more about snaps? Want to publish your own application? Visit snapcraft.io now.