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Bug 1488329 - (CVE-2017-14140) CVE-2017-14140 kernel: Missing permission check in move_pages system call
CVE-2017-14140 kernel: Missing permission check in move_pages system call
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=20170820,reported=2...
: Security
Depends On: 1499611 1488330 1499610 1499612 1499613 1499614
Blocks: 1488331
  Show dependency tree / graph
 
Reported: 2017-09-05 03:45 EDT by Adam Mariš
Modified: 2018-08-28 18:21 EDT (History)
44 users (show)

See Also:
Fixed In Version: kernel 4.13
Doc Type: If docs needed, set a value
Doc Text:
The move_pages system call in mm/migrate.c in the Linux kernel doesn't check the effective uid of the target process. This enables a local attacker to learn the memory layout of a setuid executable allowing mitigation of ASLR.
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RHEL 7.3 requirements from Atomic Host:
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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-2018:0676 None None None 2018-04-10 04:05 EDT
Red Hat Product Errata RHSA-2018:1062 None None None 2018-04-10 05:29 EDT

  None (edit)
Description Adam Mariš 2017-09-05 03:45:23 EDT 
The move_pages system call in mm/migrate.c in the Linux kernel before
4.12.9 doesn't check the effective uid of the target process, enabling
a local attacker to learn the memory layout of a setuid executable
despite ASLR.

Upstream patch:

https://github.com/torvalds/linux/commit/197e7e521384a23b9e585178f3f11c9fa08274b9
Comment 1 Adam Mariš 2017-09-05 03:46:29 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1488330]
Comment 2 Justin M. Forbes 2017-09-05 10:02:39 EDT 
This was fixed in 4.12.9 stable which is currently available across all supported Fedora releases.
Comment 4 Wade Mealing 2017-10-09 01:36:40 EDT 
Statement:
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5,6,7 and MRG-2.

Red Hat Enterprise Linux 5 and 6 are in the Production 3 Phase. During the
Production 3 Phase, Critical impact Security Advisories (RHSAs) and
selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as
they become available.

The official life cycle policy can be reviewed here:

https://access.redhat.com/support/policy/updates/errata/


This issue does not meet the inclusion criteria for the Production 3 Phase
and will be marked as CLOSED/WONTFIX. If this remains a critical
requirement, please contact Red Hat Customer Support to request
a re-evaluation of the issue, citing a clear business justification. Note
that a strong business justification will be required for re-evaluation.
Red Hat Customer Support can be contacted via the Red Hat Customer Portal.
  
Future Linux kernel updates for Red Hat Enterprise Linux 7 may address this issue.
Comment 8 errata-xmlrpc 2018-04-10 04:05:32 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0676 https://access.redhat.com/errata/RHSA-2018:0676
Comment 9 errata-xmlrpc 2018-04-10 05:29:07 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:1062 https://access.redhat.com/errata/RHSA-2018:1062
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