Summary
The remote host is missing an update to udev
announced via advisory FEDORA-2009-3712.
Solution
Apply the appropriate updates.
This update can be installed with the yum update program. Use su -c 'yum update udev' at the command line.
For more information, refer to Managing Software with yum, available at http://docs.fedoraproject.org/yum/.
https://secure1.securityspace.com/smysecure/catid.html?in=FEDORA-2009-3712
Insight
The udev package contains an implementation of devfs in userspace using sysfs and netlink.
Update Information:
udev provides a user-space API and implements a dynamic device directory, providing only the devices present on the system. udev replaces devfs in order to provide greater hot plug functionality. Netlink is a datagram oriented service, used to transfer information between kernel modules and user-space processes.
It was discovered that udev did not properly check the origin of Netlink messages. A local attacker could use this flaw to gain root privileges via a crafted Netlink message sent to udev, causing it to create a world- writable block device file for an existing system block device (for example, the root file system). (CVE-2009-1185)
An integer overflow flaw, potentially
leading to heap-based buffer overflow was found in one of the utilities providing functionality of the udev device information interface. An attacker could use this flaw to cause a denial of service, or possibly, to execute arbitrary code by providing a specially-crafted arguments as input to this utility. (CVE-2009-1186)
Thanks to Sebastian Krahmer of the SUSE Security Team for responsibly reporting this flaw.
Users of udev are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the update, the udevd daemon will be restarted automatically.
ChangeLog:
* Thu Apr 16 2009 Harald Hoyer 124-4
- fix for CVE-2009-1186
* Tue Apr 14 2009 Harald Hoyer 124-3
- fix for CVE-2009-1185
* Wed Aug 6 2008 Harald Hoyer 124-2
- added patch for cdrom tray close bug (rhbz#453095) - fixed udevadm syntax in start_udev (credits B.J.W. Polman)
References
Severity
Classification
-
CVE CVE-2009-1185, CVE-2009-1186 -
CVSS Base Score: 7.2
AV:L/AC:L/Au:N/C:C/I:C/A:C
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