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Linux Kernel "SG_IO" SCSI IOCTL Privilege Escalation Vulnerability

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Release Date:  2011-12-23    Views:  13,771

Secunia Advisory SA47296

Where:

Local system

Impact:

Privilege escalation

Solution Status:

Unpatched

Operating System:

CVE Reference(s):

Description


A vulnerability has been reported in the Linux Kernel, which can be exploited by malicious, local users and malicious, local users in a guest virtual machine to gain escalated privileges.

The vulnerability is caused due to SG_IO SCSI IOCTL commands being passed down to the block device without properly honoring access restrictions to e.g. single partitions or LVM volumes. This can e.g. be exploited by a privileged guest user in certain virtualisation setups to read from or write to the host's block device.


Solution:
Restrict access to trusted users only.

Provided and/or discovered by:
Paolo Bonzini, Red Hat

Original Advisory:
Paolo Bonzini:
https://lkml.org/lkml/2011/12/22/270

Red Hat bug #752375:
https://bugzilla.redhat.com/show_bug.cgi?id=752375

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Linux Kernel "SG_IO" SCSI IOCTL Privilege Escalation Vulnerability

User Message
[+]

Lanan_Makz

RE: Linux Kernel "SG_IO" SCSI IOCTL Privilege Escalation Vulnerability
This reply has been minimised due to a negative Relevancy Score.

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