This article doesn't mention what the attack vector is, just talks in general terms about what the attackers do after the server is compromised. A lot of the re

This article doesn't mention what the attack vector is, just talks in general terms about what the attackers do after the server is compromised. A lot of the recent security articles around Apache talk about massive numbers of servers getting compromised but say say very little about HOW the compromise happened. Is there a specific reason for that?