Careful, that zero-day signature you just got from your IPS vendor could be used against you: Researchers from Errata Security at Black Hat USA this week will show how an attacker can easily reverse-engineer these zero-day filters that IPS (intrusion prevention system) vendors distribute, and then use them to leverage an attack. Errata CEO Robert Graham and CTO David Maynor will demonstrate this using TippingPoint’s signatures, but Graham says it’s possible to reverse-engineer any IPS vendor’s zero-day signatures. The researchers will show how these signatures basically give an attacker the ammunition to do damage using bugs that wouldn’t have otherwise been known about yet.