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Panda Security advises webmasters to check their Web pages,

by Marianna Schmudlach / April 24, 2008 2:22 AM PDT

due to a massive hacker attack -
Virus Alerts, by Panda Security (http://www.pandasecurity.com)

Madrid, April 24, 2008 - PandaLabs has reported a vulnerability in
Internet Information Server which is allowing a massive hacker attack.
This attack currently affects 282,000 Web pages, and this number could
increase drastically.

This security problem allows hackers to inject SQL code in all the pages
hosted on a Web server. This code is designed to redirect all visitors
at compromised pages to a malicious website which analyzes systems for
vulnerabilities that could be used to download all types of threats.

The situation is exacerbated by the fact that most of the web pages
affected show no suspicious signs whatsoever and many of them have
numerous visitors.

How to detect if a web page has been manipulated:

Panda Security advises all webmasters with pages hosted on Internet
Information Server to check as soon as possible if their web pages have
been affected. The procedure is simple, as it involves searching for a
specific code string in the source code of the web page, associated to
an IFRAME tag. This string is:

<script src=http://www.nihaorr1.com/1.js>

If detected, it should be immediately eliminated and those responsible
for administering the server hosting the Web pages should be warned to
enable them to implement the corresponding security measures.

Given the large number of Web pages affected, many users could have been
infected by all types of malicious code, including new strains as yet
unrecognized by security companies. To check if systems are infected,
Panda Security advises users to go to http://www.infectedornot.com, and
scan their computers, free of charge, with the ActiveScan 2.0 online
scanner, a security solution that operates on the basis of 'collective
intelligence' and can detect many more threats than any other security

More information is available in the PandaLabs blog:

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