Presented at
DEF CON 31 (2023),
Aug. 12, 2023, 11 a.m.
(45 minutes)
Logs are a vital component for maintaining application reliability, performance, and security. They serve as a source of information for developers, security teams, and other stakeholders to understand what has happened or gone wrong within an application. However, logs can also be used to compromise the security of an application by injecting malicious content.
In this presentation, we will explore how ANSI escape sequences can be used to inject, vandalize, and even weaponize log files of modern applications. We will revisit old terminal injection research and log tampering techniques from the 80-90s. Combine them with new features, to create chaos and mischief in the modern cloud cli’s, mobile, and feature-rich DevOps terminal emulators of today.
We will then provide solutions on how to avoid passing on malicious escape sequences into our log files. By doing so, we can ensure that we can trust the data inside our logs, making it safe for operators to use shells to audit files. Enabling responders to quickly and accurately investigate incidents without wasting time cleaning, or having to gather additional data, while reconstructing events.
Welcome to this "not so black and white," but rather quite colorful ANSI adventure, and learn how to cause, or prevent a forensic nightmare.
REFERENCES:
There are multiple references to prior research featured and provided as a part of the storyline in the presentation.
Presenters:
-
STÖK
- Hacker / Creative at Truesec
Hacker/Creative STÖK is passionate about learning new things and sharing his curiosity with the world. For the last 3 decades, he has professionally hacked anything from computers/tech to marketing, fashion, communication, and the human mind. By delivering fast-paced, engaging onstage presentations and creating educational cybersecurity video content for the hacker community. His curiosity and "Good Vibes Only" mentality have reached and inspired millions of people around the world.
HACKERS GONNA HACK.
CREATORS GONNA CREATE.
GOOD VIBES ONLY.
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