iDefense reported several flaws in the X.org MIT-SHM extension. The iDefense
Local exploitation of an information disclosure vulnerability in the
X.Org X server, as included in various vendors' operating system
distributions, could allow an attacker to gain access to sensitive
information stored in server memory.
The vulnerability exists when creating a Pixmap in the fbShmPutImage()
function. The width and height of the Pixmap, which are controlled by
the user, are not properly validated to ensure that the Pixmap they
define are within the bounds of the shared memory segment. This allows
an attacker to read arbitrary areas of memory in the X Server process.
xorg-x11-server-184.108.40.2062-3.20080612.fc9 has been submitted as an update for Fedora 9
xorg-x11-server-220.127.116.112-3.20080612.fc9 has been pushed to the Fedora 9 testing repository. If problems still persist, please make note of it in this bug report.
If you want to test the update, you can install it with
su -c 'yum --enablerepo=updates-testing update xorg-x11-server'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F9/FEDORA-2008-5254
xorg-x11-server-18.104.22.168-17.fc7 has been pushed to the Fedora 7 stable repository. If problems still persist, please make note of it in this bug report.
xorg-x11-server-22.214.171.1242-3.20080612.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.
xorg-x11-server-126.96.36.199-46.fc8 has been pushed to the Fedora 8 stable repository. If problems still persist, please make note of it in this bug report.
This issue was addressed in:
Red Hat Enterprise Linux: