X.Org server (xorg-server) 1.0.0 and later, X11R6.9.0, and X11R7.0 inadvertently treats the address of the geteuid function as if it is the return value of a call to geteuid, which allows local users to bypass intended restrictions and (1) execute arbitrary code via the -modulepath command line option or (2) overwrite arbitrary files via -logfile.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| X11r6 | X.org | 6.9 (including) | 6.9 (including) |
| X11r7 | X.org | 1.0 (including) | 1.0 (including) |
| X11r7 | X.org | 1.0.1 (including) | 1.0.1 (including) |
| Xorg-server | Ubuntu | dapper | * |
| Xorg-server | Ubuntu | devel | * |
| Xorg-server | Ubuntu | edgy | * |
| Xorg-server | Ubuntu | feisty | * |