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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
(Ubuntu Issues Fix) Linux Kernel sg_ioctl() Stack Overflow Lets Local Users Cause Denial of Service Conditions on the Target System
SecurityTracker Alert ID:  1039380
SecurityTracker URL:  http://securitytracker.com/id/1039380
CVE Reference:   CVE-2017-7187   (Links to External Site)
Date:  Sep 19 2017
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Ubuntu 14.04 LTS
Description:   A vulnerability was reported in the Linux kernel. A local user can cause denial of service conditions on the target system.

A local user can supply a specially crafted command size value to an SG_NEXT_CMD_LEN IOCTL call to trigger a stack overflow and cause denial of service conditions on the target system.

The vulnerability resides in the sg_ioctl() function in 'drivers/scsi/sg.c'.

The original advisory is available at:

https://gist.github.com/dvyukov/48ad14e84de45b0be92b7f0eda20ff1b

Dmitry Vyukov reported this vulnerability.

Impact:   A local user can cause denial of service conditions on the target system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://www.ubuntu.com/usn/usn-3422-1

Vendor URL:  www.ubuntu.com/usn/usn-3422-1 (Links to External Site)
Cause:   Boundary error

Message History:   This archive entry is a follow-up to the message listed below.
Mar 21 2017 Linux Kernel sg_ioctl() Stack Overflow Lets Local Users Cause Denial of Service Conditions on the Target System



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