Following Adobe user forum breach, hacker claims he has access to Yahoo servers
thenextweb.com
thenextweb.com
Also, the apparent SQL injection is on a yahoo.net domain which Yahoo uses for untrusted third-party stuff mostly. The fact that the error seems to be from ASP is further evidence that this is very likely some third-party hosted app that doesn't actually have much to do with Yahoo and likely poses no danger to Yahoo users beyond the ones using this particular third-party service, whatever it is.
1) Source code show (presumably the attacker's?) shows MySQL usernames/passwords (as implied by variable names)
2) SQL injection attack screen shows errors in System.Data.SqlClient namespace - this is SQL Server: http://msdn.microsoft.com/en-us/library/system.data.sqlclien...
Might mean nothing. Article says the attacker had access to 12 databases, so maybe it's a mix of different platforms. Still, the 2 screenshots really don't corroborate one another.