Bug 1660375 (CVE-2018-16884) - CVE-2018-16884 kernel: nfs: use-after-free in svc_process_common()
Summary: CVE-2018-16884 kernel: nfs: use-after-free in svc_process_common()
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-16884
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: Engineering1653675 Engineering1660818 Engineering1660819 Engineering1660820 Engineering1660821 Engineering1660822 Engineering1660823 Engineering1660824 1660825 Engineering1738868 Engineering1738869 Engineering1739304
Blocks: Embargoed1660379
TreeView+ depends on / blocked
 
Reported: 2018-12-18 08:54 UTC by Andrej Nemec
Modified: 2023-03-24 14:26 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.
Clone Of:
Environment:
Last Closed: 2019-07-29 19:18:24 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2019:1978 0 None None None 2019-07-30 14:16:34 UTC
Red Hat Product Errata RHSA-2019:1873 0 None None None 2019-07-29 15:14:27 UTC
Red Hat Product Errata RHSA-2019:1891 0 None None None 2019-07-29 15:15:32 UTC
Red Hat Product Errata RHSA-2019:2696 0 None None None 2019-09-10 13:46:11 UTC
Red Hat Product Errata RHSA-2019:2730 0 None None None 2019-09-11 09:09:24 UTC
Red Hat Product Errata RHSA-2019:3309 0 None None None 2019-11-05 20:34:57 UTC
Red Hat Product Errata RHSA-2019:3517 0 None None None 2019-11-05 21:05:36 UTC
Red Hat Product Errata RHSA-2020:0204 0 None None None 2020-01-22 21:24:47 UTC
Red Hat Product Errata RHSA-2020:2854 0 None None None 2020-07-07 13:18:34 UTC

Description Andrej Nemec 2018-12-18 08:54:58 UTC 
A flaw was found in the Linux kernel in the NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel id and cause a use-after-free. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.

References:

https://seclists.org/oss-sec/2018/q4/267

A proposed patchset:

https://patchwork.kernel.org/cover/10733767/

https://patchwork.kernel.org/patch/10733769/
Comment 3 Vladis Dronov 2018-12-18 22:16:37 UTC 
Acknowledgements:

Name: Vasily Averin (Virtuozzo), Evgenii Shatokhin (Virtuozzo)
Comment 4 Vladis Dronov 2018-12-19 10:11:26 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1660825]
Comment 6 errata-xmlrpc 2019-07-29 15:14:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:1873 https://access.redhat.com/errata/RHSA-2019:1873
Comment 7 errata-xmlrpc 2019-07-29 15:15:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:1891 https://access.redhat.com/errata/RHSA-2019:1891
Comment 8 Product Security DevOps Team 2019-07-29 19:18:24 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-2018-16884
Comment 15 errata-xmlrpc 2019-09-10 13:46:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Extended Update Support

Via RHSA-2019:2696 https://access.redhat.com/errata/RHSA-2019:2696
Comment 16 errata-xmlrpc 2019-09-11 09:09:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2019:2730 https://access.redhat.com/errata/RHSA-2019:2730
Comment 19 errata-xmlrpc 2019-11-05 20:34:56 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 20 errata-xmlrpc 2019-11-05 21:05:35 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 2020-01-22 21:24:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:0204 https://access.redhat.com/errata/RHSA-2020:0204
Comment 25 errata-xmlrpc 2020-07-07 13:18:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:2854 https://access.redhat.com/errata/RHSA-2020:2854
Note You need to log in before you can comment on or make changes to this bug.