Description
(1) bash before 1.14.7, and (2) tcsh 6.05 allow local users to gain privileges via directory names that contain shell metacharacters (` back-tick), which can cause the commands enclosed in the directory name to be executed when the shell expands filenames using the \w option in the PS1 variable.
References
- 19960919 Vulnerability in expansion of PS1 in bash & tcsh mailing-list
- 19960913 tee see shell problems mailing-list