SQL-Server Builds, SPs und CUs
Find builds, file versions and cumulative updates for both SQL 2005 and SQL 2008 on that blog posting: https://blog.trivadis.com/blogs/imsms/archive/2009/04/14/sql-server-builds-sps-und-cus-sp1-f-252-r-sql-server-2008-verf-252-gbar.aspx
A little bit more detailed information to be found here: https://www.sqlteam.com/article/sql-server-versions