Tag Archives: Debian

Packabit project: building Nmap deb packages for Ubuntu

1 Reply

Packabit project: building Nmap deb packages for Ubuntu. During the long New Year holidays (30 dec – 8 jan) I started a new project: Vagrant-based Linux package builder called Packabit. I thought it might be nice to have scripts that will automatically build a Linux packages from sources and will NOT litter main system with unnecessary packages. Something like a very simplified build server.

Packabit - Vagrant-based Linux package builder

Why might someone want to build Linux packages on their own?

Official repositories of Linux distros usually contain pretty old versions of packages. Let’s take, for example, Nmap. The only version of Nmap available in the repository for Ubuntu 18.04.1 LTS is 7.60 , and the latest stable version of Nmap available on official website is 7.70.

Release dates according Nmap changelog:

  • Nmap 7.70 [2018-03-20]
  • Nmap 7.60 [2017-07-31]

The latency is more than a year.

Is it really necessary to use the latest version? Actually, yes. Every new version of Nmap contain more banner detects and service detects and produce more adequate results. Nmap project offers official packages only for RPM-based distributions: CentOS, RHEL, Fedora, etc. And if you need packages for DEB-based distributions, Debian, Ubuntu, Kali, etc. you should build them yourself.

What is the Packabit?

Currently it’s just 2 bash scripts for building stable Nmap package for Ubuntu 18.04: one is for creation and launching Vagrant virtual machine, the other runs on guest virtual machine and build Nmap package from the sources.

How to try it

I want this project to be as opensource as possible. If anyone wants to give it a try, get it from Github. For the end-user it looks like this: run the script build_nmap.sh, wait for 10 minutes and get new package from the packages directory. There won’t be any litter in a process. Each time a new virtual machine for building will be automatically created and then destroyed.

Continue reading →

Making Vulnerable Web-Applications: XXS, RCE, SQL Injection and Stored XSS ( + Buffer Overflow)

6 Replies

Making Vulnerable Web-Applications: XXS, RCE, SQL Injection and Stored XSS ( + Buffer Overflow). In this post I will write some simple vulnerable web applications in python3 and will show how to attack them. This is all for educational purposes and for complete beginners. So please don’t be too hard on me. 😉

Vulnerability Examples

As a first step I will create a basic web-application using twisted python web server (you can learn more about it in “Making simple Nmap SPA web GUI with Apache, AngularJS and Python Twisted“).

Continue reading →

Vulnerability Databases: Classification and Registry

5 Replies

Vulnerability Databases: Classification and Registry. What publicly available Vulnerability Databases do we have? Well, I can only say that there are a lot of them and they are pretty different. Here I make an attempt to classify them.

It’s quite an ungrateful task. No matter how hard you try, the final result will be rather inaccurate and incomplete. I am sure someone will be complaining. But this is how I see it. 😉 If you want to add or change something feel free to make a comment bellow or email me@avleonov.com.

The main classifier, which I came up with:

  • There are individual vulnerability databases in which one identifier means one vulnerability. They try to cover all existing vulnerabilities.
  • And others are security bulletins. They cover vulnerabilities in a particular product or products. And they usually based on on patches. One patch may cover multiple vulnerabilities.

I made this diagram with some Vulnerability Databases. Note that I wanted to stay focused, so there are no exploit DBs, CERTs, lists of vulnerabilities detected by some researchers (CISCO Talos, PT Research, etc.), Media and Bug Bounty sites.

Vulnerability Databases classification

For these databases the descriptions of vulnerabilities are publicly available on the site (in html interface or downloadable data feed), or exist in a form of paid Vulnerability Intelligence service (for example, Flexera).

On one side there are databases of individual vulnerabilities, the most important is National Vulnerability Database. There are also Chinese, Japanese bases that can be derived from NVD or not.

On the other side we have security bulletins, for example RedHat Security Advisories.

And in the middle we have a Vulnerability Databases, for which it is not critical whether they have duplicated vulnerability IDs or not.

Continue reading →

Vulchain scan workflow and search queries

1 Reply

Vulchain scan workflow and search queries. This post will be about my Vulnerability Scanner project – Vulchain. Recently I’ve spent couple of my weekends almost exclusively on coding: refactoring the scan engine, creating API and GUI.

Vulchain scan workflow and search queries

I was doing it because of the conferences, where I will be speaking soon:

Pretty intense schedule for a guy who spends most of his time in PyCharm and Linux console. 😉 Very excited! So, it seemed right to add a couple of slides about my project and show that something is already working.

Continue reading →

Great OpenVAS news: delay in plugin feed will be dropped, new GVM-Tools for remote management released

1 Reply

Great OpenVAS news: delay in plugin feed will be dropped, new GVM-Tools for remote management released. Jan Oliver Wagner, CEO of Greenbone and OpenVAS Community leader sent recently several messages to community email list with the great news.

First of all, Greenbone decided to drop two weeks delay in a free plugin feed, that was implemented in June 2017 and made some OpenVAS users pretty nervous.

I wrote about it in “GSM Community Edition and lagging OpenVAS Plugin Feed“. The good thing is that, it has increased interest in NASL scripting among OpenVAS users. I also made some steps in this way in “Adding third party nasl plugins to OpenVAS“. I don’t now why Greenbone finally decided to drop this delay, but I am very glad for this decision. Wise move!

The feed will stay delayed until September 4th, 2017. To demonstrate the current state I used some data from Vulners.com collections. Let’s see the nasl vulnerability detection plugins for CentOS in Nessus and OpenVAS. I know that Windows would be much more clear, but Microsoft released latest MS17-023 bulletin in March, so now there is no much difference there.

CentOS Nessus Openvas 2 week delay

As you can see, no OpenVAS plugins since 2017-08-16, literally two weeks. And I hope this will change very soon.

Don’t forget that NVT will be called now GCF (Greenbone Community Feed) and some advanced enterprise-level checks will be now released only in paid feed.

Another good news is the recent release of open source GVM-Tools for controlling OpenVAS remotelly. It will replace old console client openvas-cli (omp). Let’s try to download and install it on Debian host with installed OpenVAS (see “Installing OpenVAS 9 from the sources“).

Continue reading →

Installing OpenVAS 9 from the sources

28 Replies

Installing OpenVAS 9 from the sources. upd. 29.09.2018 Unfortunately, the script does not work after Greenbone moved the sources from their internal repository to GitHub. It’s necessary to edit the script. Stay tuned.

In last month Greenbone Networks and OpenVAS development team have finally presented new OpenVAS 9 with new GUI, improved multi-scanner support, improved asset management, etc. We have been waiting for this release for 2 years!

Upd. Please note, that entire procedure for separating scanners onto separate hardware/distributed hardware in different datacenters has changed completely – and that it’s a good idea to get familiar with this new procedure prior to upgrading to OpenVAS 9. 😉

For installing OpenVAS 9 from the sources I used the same script as for OpenVAS 8 installation last year. More details about this script and why you may need it you can read in the post “openvas_commander for OpenVAS installation and management“.

OpenVAS 9 Dashboards

I fixed the script a bit because of these changes in OpenVAS9:

  • openvas-nvt-syncwas renamed to greenbone-nvt-sync
  • openvas-mkcert and openvas-mkcert-client were replaced by openvas-manage-certs

Continue reading →

New Vulners.com services for Linux Security Audit and Vulnerability Alerting

9 Replies

New Vulners.com services for Linux Security Audit and Vulnerability Alerting. Upd. This post is out of date! Check out “Vulners Linux Audit API for Host Vulnerability Detection: Manual Auditing, Python Scripting and Licensing” from 2021.

A few weeks ago I was describing how to perform Linux Vulnerability Assessment without a Vulnerability Scanner. I also wrote in “Vulnerability scanners: a view from the vendor and end user side” that vulnerability scanning is not rocket science and it is easy to make your own scanner for vulnerabilities for a particular OS. Especially it is a popular Linux Distribution.

But. It’s one thing to write that you can do it, and another thing to develop a script for home use, and quite another thing to make a publicly available and efficient service…

Vulners Team guys have actually created such free Linux Vulnerability Audit service!

Linux Vulnerability Audit Service

First of all, they made a GUI where you can specify OS version (usually it is in the /etc/os-release file), list of packages installed on the host and get the list of vulnerabilities.

For example, here are the vulnerabilities for my Ubuntu Laptop, which I update frequently:

Ubuntu Vulners Linux Audit Input

One vulnerability was found:

Ubuntu Vulners Linux Audit Results

But GUI is good for demonstration. In real life, you can use Vulners Audit API. It will return list of vulnerabilities in JSON.

Continue reading →