vcdiff in Emacs 20.7 to 22.1.50, when used with SCCS, allows local users to overwrite arbitrary files via a symlink attack on temporary files.
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Emacs | Gnu | 20.7 (including) | 20.7 (including) |
| Emacs | Gnu | 21.1 (including) | 21.1 (including) |
| Emacs | Gnu | 21.2 (including) | 21.2 (including) |
| Emacs | Gnu | 21.3 (including) | 21.3 (including) |
| Emacs | Gnu | 21.4 (including) | 21.4 (including) |
| Sccs | Gnu | * | * |