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Bug 1577408 - (CVE-2018-10940) CVE-2018-10940 kernel: incorrect memory bounds check in drivers/cdrom/cdrom.c
CVE-2018-10940 kernel: incorrect memory bounds check in drivers/cdrom/cdrom.c
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20180418,reported=2...
: Security
Depends On: 1578206 1578208 1578211 1577409 1578207 1578209 1578210 1578604
Blocks: 1577410
  Show dependency tree / graph
 
Reported: 2018-05-11 18:20 EDT by Laura Pardo
Modified: 2018-10-30 05:01 EDT (History)
43 users (show)

See Also:
Fixed In Version: kernel 4.16.6
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel, before 4.16.6 where the cdrom_ioctl_media_changed function in drivers/cdrom/cdrom.c allows local attackers to use a incorrect bounds check in the CDROM driver CDROM_MEDIA_CHANGED ioctl to read out kernel memory.
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Add an attachment (proposed patch, testcase, etc.)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2948 None None None 2018-10-30 05:01 EDT
Red Hat Product Errata RHSA-2018:3083 None None None 2018-10-30 03:34 EDT
Red Hat Product Errata RHSA-2018:3096 None None None 2018-10-30 03:40 EDT

  None (edit)
Description Laura Pardo 2018-05-11 18:20:36 EDT 
The cdrom_ioctl_media_changed function in drivers/cdrom/cdrom.c in the Linux kernel before 4.16.6 allows local attackers to use a incorrect bounds check in the CDROM driver CDROM_MEDIA_CHANGED ioctl to read out kernel memory.


References:
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.16.6
https://github.com/torvalds/linux/commit/9de4ee40547fd315d4a0ed1dd15a2fa3559ad707
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9de4ee40547fd315d4a0ed1dd15a2fa3559ad707
Comment 4 Wade Mealing 2018-05-14 23:40:01 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1578210]
Comment 7 Justin M. Forbes 2018-05-15 10:47:42 EDT 
This was fixed for Fedora with the 4.16.6 stable update.
Comment 10 errata-xmlrpc 2018-10-30 03:33:42 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3083 https://access.redhat.com/errata/RHSA-2018:3083
Comment 11 errata-xmlrpc 2018-10-30 03:39:55 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3096 https://access.redhat.com/errata/RHSA-2018:3096
Comment 12 errata-xmlrpc 2018-10-30 05:01:23 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2018:2948
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