After an Exploit: Mitigation and Remediation

by Jamie Riden Sept. 15, 2017 via

As we all know, prevention, detection and response are our three main lines of defence against threats, with a good administrator putting most focus on prevention. As the old adage goes, "an ounce of prevention is worth a pound of cure" - a 1:16 ratio for the metrically inclined - but there's always going to be the odd occasion where prevention fails, either through a lack of time or a mistake in one's security procedure. In this article we describe a few hardening and alerting methods for Unix servers that help block vectors for various attacks, including two web-based application attacks and the brute-forcing of SSH passwords. The article then looks at what an administrator should do post-compromise. These incidents have been drawn from both honeypots and real systems.

Steven Ulm 1 month ago

Simple and to the point. Very well written article!