Title: GNOME gdm XDMCP Buffer Overflow Vulnerability
Severity: CRITICAL
Description:
A buffer overrun exists in the XDMCP handling code used in 'gdm', an xdm replacement, shipped as part of the GNOME desktop. By sending a maliciously crafted XDMCP message, it is possible for a remote attacker to execute arbitrary commands as root on the susceptible machine. The problem lies in the handling of the display information sent as part of an XDMCP 'FORWARD_QUERY' request.
By default, gdm is not configured to listen via XDMCP. The versions of gdm shipped with RedHat 6.0-6.2, Helix GNOME and gdm built from source are not vulnerable unless they were configured to accept XDMCP requests. This is configured via the /etc/X11/gdm/gdm.conf on some systems, although this file may vary. If the "Enable" variable is set to 0, you are not susceptible.
Affected Products:
- GNOME Gnome 1.0.0 .X
- MandrakeSoft Linux Mandrake 8.0.0
- Martin K. Peterson gdm 1.0.0 .X
- Martin K. Peterson gdm 2.0.0 .x BETA
- Martin K. Peterson gdm 2.2.0 .0
Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.
