This in itself is not an issue due to the lack of a suid bit... however if I remember correctly there were a few linux suid root binaries that were reliant upon m4 in some way or another thus making them vulnerable to a local root expoit. This is on osx 10.1.
[OSXBOX:~] elguapo% ls -al `which m4` -r-xr-xr-x 1 root wheel 26696 Sep 2 20:59 /usr/bin/m4 [OSXBOX:~] elguapo% ls -al `which gm4` -rwxr-xr-x 1 root wheel 97464 Sep 2 20:53 /usr/bin/gm4 [OSXBOX:~] elguapo% m4 %p m4: %p: No such file or directory [OSXBOX:~] elguapo% gm4 %p gm4: 0x4f4d453d: No such file or directory [OSXBOX:~] elguapo% gm4 %s gm4: Memory bounds violation detected (SIGSEGV). Either a stack overflow occurred, or there is a bug in gm4. Check for possible infinite recursion. Segmentation fault