lsfs in AIX 4.x allows a local user to gain additional privileges by creating Trojan horse programs named (1) grep or (2) lslv in a certain…

lsfs in AIX 4.x allows a local user to gain additional privileges by creating Trojan horse programs named (1) grep or (2) lslv in a certain directory that is under the user's control, which cause lsfs to access the programs in that directory.