rcs2log, as used in Emacs 20.4, xemacs 21.1.10 and other versions before 21.4, and possibly other packages, allows local users to modify files of other users via a symlink attack on a temporary file.
| Software | From | Fixed in |
|---|---|---|
| gnu / emacs | 20.4 | 20.4.x |
| xemacs / xemacs | 21.1.10 | 21.1.10.x |