Escape From SQL Hell

Wednesday, 5 March 2003, 2:24 PM EST

Upfront preparation helped my company ward off the SQL Slammer worm, which exploits a buffer overflow vulnerability in Microsoft SQL Server and creates a flood of packets, similar to a denial-of-service attack. But we still didn't totally avoid it.

Shortly after the worm appeared, we decided to run scans of our infrastructure to find and patch vulnerable systems. In the interim, we implemented Cisco Systems Inc.'s Network-Based Application Recognition (NBAR) feature on our core edge routers, configuring it to drop any packets that matched the signature of the SQL Slammer attack. The problem with NBAR is that routers are designed to route traffic, not inspect packet payloads. NBAR consumes a considerable amount of router resources and can lead to performance problems, so we didn't want to keep it in place any longer than necessary.

[ Read more ]




Spotlight

eBook: Cybersecurity for Dummies

Posted on 16 December 2014.  |  APTs have changed the world of enterprise security and how networks and organizations are attacked. These threats, and the cybercriminals behind them, are experts at remaining hidden from traditional security while exhibiting an intelligence, resiliency, and patience that has never been seen before.


Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.
  



Daily digest

Receive a daily digest of the latest security news.
  
DON'T
MISS

Fri, Dec 19th
    COPYRIGHT 1998-2014 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //