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

SECUNIA ADVISORY ID:
SA47296

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47296/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47296

RELEASE DATE:
2011-12-23

DISCUSS ADVISORY:
http://secunia.com/advisories/47296/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Criticality Level
 * Impact
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 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/47296/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=47296

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
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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

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
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