A race condition in the at command for Solaris 2.6 through 9 allows local users to delete arbitrary files via the -r argument with .. (dot dot) sequences in the job name, then modifying the directory structure after at checks permissions to delete the file and before the deletion actually takes place.
The finger daemon (in.fingerd) in Sun Solaris 2.5 through 8 and SunOS 5.5 through 5.8 allows remote attackers to list all accounts on a host by typing finger 'a b c d e f g h'@host.
Solaris ff.core allows local users to modify files.
ping in Solaris 2.3 through 2.6 allows local users to cause a denial of service (crash) via a ping request to a multicast address through the loopback interface, e.g. via ping -i.
The access permissions for a UNIX domain socket are ignored in Solaris 2.x and SunOS 4.x, and other BSD-based operating systems before 4.4, which could allow local users to connect to the socket and possibly disrupt or control the operations of the program using that socket.
pcnfsd (aka rpc.pcnfsd) allows local users to change file permissions, or execute arbitrary commands through arguments in the RPC call.