A vulnerability has been identified in AWStats, it could be exploited by attackers to execute arbitrary code and compromise a vulnerable system. The problem results from an input validation error in the "awstats.pl" file when handling the "configdir" parameter, which can be exploited by attackers to execute arbitrary command using "|" characters.
Use AWStats version 6.3 : http://awstats.sourceforge.net/#DOWNLOAD
Or replace the lines :
if ($QueryString =~ /configdir=([^&]+)/i) { $DirConfig=&DecodeEncodedString("$1"); }
With :
if ($QueryString =~ /configdir=([^&]+)/i) { $DirConfig=&DecodeEncodedString("$1");
$DirConfig=~tr/a-z0-9_\-\/\./a-z0-9_\-\/\./cd; } References
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