Compass Security Blog

Offensive Defense

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Introduction to Windows Exploits

As part of the Compass research week, I dived into Windows exploit development. Conclusion is, that the basic exploiting principles from unix also apply on Windows. The biggest difference is the availability of much more advanced security tools, primarily debuggers and system analysis utilities, and some additional attack vectors like SEH. Also different versions of […]

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Bypass File Download Restrictions in Content Filters

Companies battle with users who download files from the Internet at work and then execute them. Unsuspicious files are often infected with malware. A common procedure to decrease the amount of infections is to block common bad file types (for example .exe, .scr or .zip), before the files can enter the internal network. The preconditions […]

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Samba Exploit Development Presentation

As penetration testers, our main goal is to identify as many vulnerabilities as possible. This allows our customers to more objectifly assess their security level and to shut as many doors as possible which an intruder could use to break in. This process needs to be based in respect of cost-benefit, depending on risk probabily […]

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Research über die Netkit-Telnetd Schwachstelle

Als ich nach den üblichen Weihnachtsfesten auf Twitter die neusten Sicherheitsmeldungen überflog, bin ich auf einen interessanten Blog Eintrag gestossen: A Textbook Buffer Overflow: A Look at the FreeBSD telnetd Code. Der Author beschreibt eine Buffer Overflow Lücke im Netkit Telnet Daemon, der im FreeBSD Betriebssystem verwendet wird. Die Schwachstelle wurde Zwei Tage vorher, am 23.12.2011 veröffentlicht. […]

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