PHP Session IDs are supposed to be random and impossible for a hacker to guess, but that's not the case says security expert Andreas Bogk.

Bogk "warns that, despite recent PHP improvements, the session IDs of users who are logged into PHP applications remain guessable," The H reported.

The problem is that PHP developers are seeding their random generator with a call to the "gettimeofday" function.

Read the whole story: http://www.developer.com/daily_news/article.php/396686/PHP-Session-IDs-Are-Guessable.htm