Young hacker smiling

We hack your software

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Expert intelligence + effective automation

Can machines learn to hack?

Machine-learning to hack

Machine learning for vulnerability discovery

To date the most important security vulnerabilities have been found via laborius code auditing. Also, this is the only way vulnerabilities can be found and fixed during development. However, as software production rates increase, so does the need for a reliable, automated method for checking or classifiying this code in …

Bounty writeup

Bounty Writeup

How to resolve HTB Bounty

Scanning Phase First of all we check the IP of the Bounty machine and try a ping to see if we have access. ping host$ ping -c2 Then scan the ports with nmap, in this case we’re going to use basic nmap. host$ nmap 10 …

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LibSSH new Vulnerability

New vulnerability on libssh CVE-2018-10933

The new vulnerability in LibSSH, tracked as CVE-2018-10933, resides on the server code which can enable a client to bypass the authentication process and create channels without permissions, this affects servers using versions 0.6 and above being used in server mode. The bug was discovered by Peter Winter-Smith of …

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DevOops Writeup

How to resolve HTB DevOops

Scanning Phase First of all we check the IP of DevOops machine and try a ping to see if we have access Then scan the ports with nmap, in this case we’re going to use basic nmap nmap And we see that the port 5000 …

The Treacherous POODLE

The Treacherous POODLE

How does the SSL fallback's works

A gas vendor, each week receives gas, which he stores in pipes and discretely refills them with water. Each day sells this gas to his clients, unbeknown to an "auditor" in black robes - aka Poodle - paying attention to this situation. One day the "auditor" undercover, tells the vendor he will …

Release the beast

Release the BEAST!

Understanding the BEAST

The Browser Exploit Attack on SSL/TLS (B.E.A.S.T), - bet you thougth it was a rampage hack that launched nukes - it is a practical attack demonstrated by Thai Duong and Julian Rizzo at ekoparty in 2011. That was the lamest introduction ever, it’s not because the …

heartbleed official logo

My heart bleeds (but not for you)

Understanding the flaw behind Heartbleed

Back in April 2014, one of the biggest vulnerabilities in recent history was found, HeartBleed. The popular open source cryptographic software library OpenSSL, had a critical flaw, [1] in the implementation of a extension on the Transport Layer Security (TLS) protocol. The wide use of OpenSSL on several services such …

Python proofreading a document

Pars orationis non est secura

Using parser combinators to detect flaws

We like bWAPP around here, because it’s very buggy!. We have shown here how to find and exploit vulnerabilities like SQL injection, directory traversal, XPath injection, and UNIX command injection. All of these have one thing in common, namely: they could have been prevented with a little Input Validation …

Pythia and supplicant in the Oracle of Delphi

The Oracle of Code

About code as data

“Most programs are too large to understand in complete detail”. This was written in the 80’s.[1] Imagine the situation today. Hence the need for automated tools to aid in the process of analyzing code. The solution, according to Oege de Moor from Semmle, is obvious: treat code as …

O'Reilly XML book cover

XML: eXploitable Markup Language

XPath injection on XML files

Markup languages are “systems for annotating a document in a way that is syntactically distinguishable from the text.” [1] What does that really mean? I reckon that’d be better understood with examples. But before, a warning: if you use them for sensitive information storage, you should be really careful …

Orion carrying Cedalion

Stand on the shoulders of giants

About software composition analysis

In our last post, we reproduced the discovery of a vulnerability in libpng. But that is only a small library, you might say, with a very limited scope and only 556 KiB installed. However, many, many packages depend on it. To see how many packages in the Arch Linux repository …

Infinite Monkey Theorem

The infinite monkey fuzzer

Fuzz testing using American Fuzzy Lop

In our last entry, we argued that fuzzing is both “dumb” and surprising. In this article, we’ll continue exploring the possibilities of fuzzing. This time though, we’ll focus on desktop application fuzzing, specifically UNIX applications written in C. When developing in C, you usually have to handle memory …

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