1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200709-11 / gdm |
| Release Date | September 18, 2007 |
| Latest Revision | September 18, 2007: 01 |
| Impact | low |
| Exploitable | local |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| gnome-base/gdm | < 2.18.4 | >= 2.18.4, revision >= 2.16.7 | All supported architectures |
Related bugreports: #187919
GDM can be crashed by a local user, preventing it from managing future displays.
GDM is the GNOME display manager.
The result of a g_strsplit() call is incorrectly parsed in the files daemon/gdm.c, daemon/gdmconfig.c, gui/gdmconfig.c and gui/gdmflexiserver.c, allowing for a null pointer dereference.
A local user could send a crafted message to /tmp/.gdm_socket that would trigger the null pointer dereference and crash GDM, thus preventing it from managing future displays.
Restrict the write permissions on /tmp/.gdm_socket to trusted users only after each GDM restart.
All GDM users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose "gnome-base/gdm" |