The fixps script in a2ps 4.14 does not use the -dSAFER option when executing gs, which allows context-dependent attackers to delete arbitrary files or execute arbitrary commands via a crafted PostScript file.

The tempname_ensure function in lib/routines.h in a2ps 4.14 and earlier, as used by the spy_user function and possibly other functions, allows local users to modify arbitrary files via a symlink attack on a temporary file.