Security Updates give the most recent protection content for Norton Internet Security, which protect networked critical systems and remote and mobile users from unwanted network intrusions and hackers, as well as from viruses, Trojans, and worms.

To download and install the Security Update 521 you need to run LiveUpdate feature of Norton Internet Security product. Please note that LiveUpdate definition identifier of Security Update 521 is 20111226.001 and its description was last modified on December 26, 2011 4:49:08 PM PST.

Security Update 521 adds coverage for the following vulnerabilities and threats:

• Web Attack: Facebook LikeJacking Attack 35:
  This signature will detect malicious web pages which are used for facebook likejacking attacks.
  
  
• Web Attack: Malicious Java Download 13:
  This signature detects attempts to download malicious JAR files
  
  
• Attack: Cytel StatXact Studio CY3 File:
  This signature detects attempts to exploit a stack based buffer overflow vulnerability in Cytel StatXact application.
  
  

Security Update 521 provides updated coverage for the following vulnerabilities and threats:

• Web Attack: Malicious Toolkit Website 10:
  This signature detect attempts to download exploits from a malicious toolkit which may compromise a computer through various vendor vulnerabilities.
  
  
• Web Attack: Blackhole Toolkit Website 12:
  This signature detects attempts to download exploits from Blackhole toolkit that may compromise a computer through various vendor vulnerabilities.
  
  
• Web Attack: Malicious Executable Download 2:
  This signature detect attempts to download exploits from a malicious toolkit which may compromise a computer through various vendor vulnerabilities.
  
  
• Web Attack: Blackhole Exploit Kit Website 11:
  This signature detects attempts to download exploits from Blackhole toolkit that may compromise a computer through various vendor vulnerabilities.