CVE-2011-4127: Medium severity suse linux enterprise server vulnerability
Last updated 24 July 2024
Other sources
Paolo Bonzini of Red Hat found out that the host Linux system allows executing the SGIO ioctl on a partition or even on an LVM volume, and will pass the command to the underlying block device. This could be further exploited in the context of virtualization, because virtio disks support a limited form of SCSI passthrough via the SGIO ioctl. If virtio disk is hosted on a partition or LVM volume with format=raw, tools such as sgdd can be used to read and write other data on the same disk --- even data that belongs to the host or to other guests.
References: https://lkml.org/lkml/2004/8/12/218 https://lkml.org/lkml/2004/8/12/260
— Red Hat
The Linux kernel before 3.2.2 does not properly restrict SGIO ioctl calls, which allows local users to bypass intended restrictions on disk read and write operations by sending a SCSI command to (1) a partition block device or (2) an LVM volume.
— Launchpad
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2011-4127?
CVE-2011-4127 is considered to have a moderate severity level as it can be exploited due to improper handling of the SG_IO ioctl.
How do I fix CVE-2011-4127?
To fix CVE-2011-4127, upgrade the affected packages to the versions recommended in the vulnerability advisory.
Which systems are affected by CVE-2011-4127?
CVE-2011-4127 affects various versions of the Linux Kernel and the libguestfs package on different Linux distributions.
What is the impact of CVE-2011-4127?
The impact of CVE-2011-4127 includes the potential for unauthorized access to the underlying block device, which could lead to additional vulnerabilities.
Is CVE-2011-4127 being actively exploited?
As of the latest information, there is no widespread indication that CVE-2011-4127 is actively being exploited in the wild.