rssh 2.0 through 2.1.x expands command line arguments before entering a chroot jail, which allows remote authenticated users to determine the existence of files in a directory outside the jail.

rssh 2.2.2 and earlier does not properly restrict programs that can be run, which could allow remote authenticated users to bypass intended access restrictions and execute arbitrary programs via (1) rdist -P, (2) rsync, or (3) scp -S.

rssh 2.0.0 through 2.2.3 allows local users to bypass access restrictions and gain root privileges by using the rssh_chroot_helper command to chroot to an external directory.

util.c in rssh 2.3.0 in Debian GNU/Linux does not use braces to make a block, which causes a check for CVS to always succeed and allows rsync and rdist to bypass intended access restrictions in rssh.conf.