Bug 1705937 (CVE-2019-11599) - CVE-2019-11599 kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping
Summary: CVE-2019-11599 kernel: fix race condition between mmget_not_zero()/get_task_m...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-11599
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
: CVE-2019-3892 (view as bug list)
Depends On: 1720782 1696079 1696080 1696081 1696082 1696083 1696084 1705938 1772263 1772264 1772265 1772266 1788048 1788049
Blocks: 1696007 1696223
TreeView+ depends on / blocked
 
Reported: 2019-05-03 09:05 UTC by msiddiqu
Modified: 2023-05-12 21:15 UTC (History)
43 users (show)

Fixed In Version: kernel 5.0.10
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel where the coredump implementation does not use locking or other mechanisms to prevent vma layout or vma flags changes while it runs. This allows local users to obtain sensitive information, cause a denial of service (DoS), or possibly have unspecified other impact by triggering a race condition with mmget_not_zero or get_task_mm calls.
Clone Of:
Environment:
Last Closed: 2019-08-06 13:22:25 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:2029 0 None None None 2019-08-06 12:04:44 UTC
Red Hat Product Errata RHSA-2019:2043 0 None None None 2019-08-06 12:07:10 UTC
Red Hat Product Errata RHSA-2019:3309 0 None None None 2019-11-05 20:35:27 UTC
Red Hat Product Errata RHSA-2019:3517 0 None None None 2019-11-05 21:06:10 UTC
Red Hat Product Errata RHSA-2020:0100 0 None None None 2020-01-14 08:04:54 UTC
Red Hat Product Errata RHSA-2020:0103 0 None None None 2020-01-14 15:53:22 UTC
Red Hat Product Errata RHSA-2020:0179 0 None None None 2020-01-21 17:02:01 UTC
Red Hat Product Errata RHSA-2020:0543 0 None None None 2020-02-18 14:43:39 UTC

Description msiddiqu 2019-05-03 09:05:35 UTC 
The coredump implementation in the Linux kernel before 5.0.10 does not use locking or other mechanisms to prevent vma layout or vma flags changes while it runs, which allows local users to obtain sensitive information, cause a denial of service, or possibly have unspecified other impact by triggering a race condition with mmget_not_zero or get_task_mm calls. This is related to fs/userfaultfd.c, mm/mmap.c, fs/proc/task_mmu.c, and drivers/infiniband/core/uverbs_main.c.

References:

https://bugs.chromium.org/p/project-zero/issues/detail?id=1790 
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.114 
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.37 
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.10

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=04f5866e41fb70690e28397487d8bd8eea7d712a
https://github.com/torvalds/linux/commit/04f5866e41fb70690e28397487d8bd8eea7d712a
Comment 1 msiddiqu 2019-05-03 09:05:57 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1705938]
Comment 2 msiddiqu 2019-05-03 09:11:53 UTC 
*** Bug 1696015 has been marked as a duplicate of this bug. ***
Comment 3 Justin M. Forbes 2019-05-03 14:22:19 UTC 
This is fixed for Fedora with the 5.0.10 stable updates.
Comment 7 Wade Mealing 2019-05-17 04:31:48 UTC 
Acknowledgments:

Name: Andrea Arcangeli (Red Hat Engineering)
Comment 12 errata-xmlrpc 2019-08-06 12:04:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2029 https://access.redhat.com/errata/RHSA-2019:2029
Comment 13 errata-xmlrpc 2019-08-06 12:07:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2043 https://access.redhat.com/errata/RHSA-2019:2043
Comment 14 Product Security DevOps Team 2019-08-06 13:22:25 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-11599
Comment 16 errata-xmlrpc 2019-11-05 20:35:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3309 https://access.redhat.com/errata/RHSA-2019:3309
Comment 17 errata-xmlrpc 2019-11-05 21:06:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3517 https://access.redhat.com/errata/RHSA-2019:3517
Comment 23 errata-xmlrpc 2020-01-14 08:04:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2020:0100 https://access.redhat.com/errata/RHSA-2020:0100
Comment 24 errata-xmlrpc 2020-01-14 15:53:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Advanced Update Support
  Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.4 Telco Extended Update Support

Via RHSA-2020:0103 https://access.redhat.com/errata/RHSA-2020:0103
Comment 25 errata-xmlrpc 2020-01-21 17:01:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Extended Update Support

Via RHSA-2020:0179 https://access.redhat.com/errata/RHSA-2020:0179
Comment 26 errata-xmlrpc 2020-02-18 14:43:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.5 Extended Update Support

Via RHSA-2020:0543 https://access.redhat.com/errata/RHSA-2020:0543
Note You need to log in before you can comment on or make changes to this bug.