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Locate PHP Web Shells on a Linux Web Server

A while ago I had put together a quick script to check files in a web directory for possible web shells. I was in a training class and looking for my information on this last week and it seems I've lost it. As such, it's time to put it up again Read more…

By Torry Crass, 11 years11 years ago
Security

Holey Bash Batman! No Really, It Has Holes (CVE-2014-6271)

UPDATED: 09/26/2014 – 01:14 EST – Added vulnerability validation code This exploit may have bigger holes than even the Bat Cave.  CVE-2014-6271 (Credit to Stephane Chazelas for discovery) was publicly announced yesterday, September, 24th and some articles are already calling this bug a larger security hole than the recent Heartbleed SSL Read more…

By Torry Crass, 11 years11 years ago
Security

Beware: One Ring Phone Scam Alert

The short version is that if you get a phone call from an unknown number that rings once and hangs up, do not call it back. Several news outlets have reported on this over the past couple of days and I thought I would do the same since I've actually Read more…

By Torry Crass, 11 years ago
Technical

Debian Lenny Archive Sources and IPv6 Failure Fixes

Debian, rightfully so, retired the lenny distribution some time ago.  Unfortunately, every now and then there might be a system sitting out there that still has it running.  For security reasons it is very important that you upgrade your system to a newer distribution, sometimes it's necessary to install a package Read more…

By Torry Crass, 11 years11 years ago
Technical

Internet Explorer 10 Security Certificate Error

I encountered a problem today when attempting to access a low-end router web interface using Internet Explorer 10. Error: The security certificate presented by this website is not secure. Yes, I know, use Firefox or some other browser. While that would have probably worked I decided to investigate further and Read more…

By Torry Crass, 12 years12 years ago
Technical

Signs When Blog Comment Spam is Incoming

One day recently, I was looking through the management tool of a site that had quite a few comments. Great news right? Unfortunately, no… all spam… As I began to look further into where the spam was coming from it became quite clear that the initial onslaught actually started out Read more…

By Torry Crass, 12 years ago
Technical

Slow SSH Login Resolved

Every once in a while I've run into a problem where SSH takes a very long time to prompt for a password and log into a system.  In almost all cases this has been related to DNS.  First, you should know that this could indicate a DNS problem, but that Read more…

By Torry Crass, 13 years13 years ago

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