Perl.Lexac

Risk Level 1: Very Low

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Discovered:: December 27, 2004
Updated:: February 13, 2007 12:31:20 PM
Type:: Worm
Systems Affected:: UNIX, Windows 2000, Windows NT, Windows Server 2003, Windows XP

Perl.Lexac is a worm that spreads to Web servers running php scripts that are vulnerable to a "File Inclusion Flaw", which results from programming errors. The worm uses the Google and Yahoo search engines to obtain a list of vulnerable computers.

Note: The File Inclusion Flaw is independent from the PHP version of the server, and results from common coding mistakes.

Antivirus Protection Dates

Initial Rapid Release version December 27, 2004
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version December 27, 2004
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date December 29, 2004

Click for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

Wild Level: Low
Number of Infections: 0 - 49
Number of Sites: 0 - 2
Geographical Distribution: Low
Threat Containment: Easy
Removal: Easy

Damage

Damage Level: Low

Distribution

Distribution Level: Low

Writeup By: Robert X Wang

Technical Details

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Internet Security Threat Report, Volume 16