Wanted to sign up for Auctiva for our new Ebay store when, lo and behold, Chrome pops up a security warning. I dug into this and found some very interesting stuff.
It looks like Auctiva has a security hole someone is actively driving their truck through it. The problem is in
http://www.auctiva.com/js/windows.jsIf you point your browser there (it's safe, it will read as text) and scroll down the bottom you should see a document.write statement. If you don't see it wait a few minutes and refresh. It looks like someone is trying to fix the file but something else is putting the attack back in which is why it might not be there when you look.
See how the URL looks like gibberish? It's ASCII code for me9x.cn, a Chinese site blacklisted by Google. The code in question writes a GIF file into the page. This is why you're getting it blocked in browsers like Firefox or Chrome, which pull the Google blacklist and enforce it. If your antivirus picked it up, good for you. The GIF file is likely reading your cookies (or worse if you're using IE). Whatever the case, that file is up to no good and if you can see this image Gortusk describes you may already have problems on your computer that you can't see.
I would highly suggest the following
1. Do not log into auctiva.com for now. The forums are clean (they appear to be on a different server) but the main site is clearly compromised.
2. Switch to Firefox or Google Chrome as your browser. Both browsers blocked the attack.
3. Run some anti-malware software, especially if your antivirus didn't catch this attack (not all antivirus has anti-malware). A good place to start is Adaware (http://www.lavasoftusa.com). There are many others out there as well (AVG seems to be catching this already).
Here's hoping for a quick fix. Was hoping to add some tools to my store today.