Xmas virus on the cards

Tuesday, 16 December 2003, 4:01 PM EST

Security experts last week warned that hackers are preparing Christmas card emails that appear to lead to innocent images, but in fact trick users with Windows systems into downloading viruses.

To avoid difficulties, firms should check their mail filtering systems to ensure they handle emailed images in the same way as other HTML traffic, and should also educate users about this issue.

Security specialist ISS said contributors to hacker mailing lists have recently been discussing new techniques to bypass firewalls by mislabelling general HTML files as JPEGs. Steven Darrall, senior consultant at ISS X-Force Security Assessment Services, said the problem is caused by Microsoft's Internet Explorer (IE) web browser automatically opening files labelled with .jpg or .gif extensions. "If the file does not contain an image, IE will try and guess the content," Darrall said.

[ Read more ]




Spotlight

Infographic: 25 years of the firewall

Posted on 24 July 2014.  |  The firewall turned 25, and McAfee is celebrating with an infographic that creatively depicts its lifetime. If you take a moment to scan the infographic, you’ll notice the firewall's introduction and evolution coincide with certain security events.


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, Jul 25th
    COPYRIGHT 1998-2014 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //