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Bug 1635929 - (CVE-2018-14659) CVE-2018-14659 glusterfs: Unlimited file creation via "GF_XATTR_IOSTATS_DUMP_KEY" xattr allows for denial of service
CVE-2018-14659 glusterfs: Unlimited file creation via "GF_XATTR_IOSTATS_DUMP_...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20181031:0800,...
: Security
Depends On: 1644583 1644757 1647665 1647669 1616829 1636305
Blocks: 1635927 1644080
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Reported: 2018-10-03 21:02 EDT by Sam Fowler
Modified: 2018-11-08 00:23 EST (History)
30 users (show)

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Doc Text:
A flaw was found in glusterfs server which allowed clients to create io-stats dumps on server node. A remote, authenticated attacker could use this flaw to create io-stats dump on a server without any limitation and utilizing all available inodes resulting in remote denial of service.
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3431 None None None 2018-10-31 04:43 EDT
Red Hat Product Errata RHSA-2018:3432 None None None 2018-10-31 04:45 EDT
Red Hat Product Errata RHSA-2018:3470 None None None 2018-11-05 09:58 EST

  None (edit)
Description Sam Fowler 2018-10-03 21:02:20 EDT
The Gluster file system through versions 4.1.4 and 3.1.2 is vulnerable to a denial of service attack via use of the "GF_XATTR_IOSTATS_DUMP_KEY" xattr. A remote, authenticated attacker could exploit this by mounting a Gluster volume and repeatedly calling "setxattr(2)" to trigger a state dump and create an arbitrary number of files in the server's runtime directory.
Comment 1 Sam Fowler 2018-10-03 21:02:31 EDT
Acknowledgments:

Name: Michael Hanselmann (hansmi.ch)
Comment 4 Doran Moppert 2018-10-29 20:49:04 EDT
Statement:

This issue did not affect Red Hat Enterprise Linux 6 and 7 as the flaw is present in glusterfs-server, which is not shipped there.

This flaw affects glusterfs versions included in Red Hat Virtualization 4 Hypervisor. However, in recommended configurations, the vulnerability is only exposed to hypervisor administrators and can not be exploited from virtual machines or other hosts on the network.
Comment 5 Siddharth Sharma 2018-10-31 04:12:56 EDT
Created glusterfs tracking bugs for this issue:

Affects: fedora-all [bug 1644583]
Comment 6 errata-xmlrpc 2018-10-31 04:43:39 EDT
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.4 for RHEL 6
  Native Client for RHEL 6 for Red Hat Storage

Via RHSA-2018:3431 https://access.redhat.com/errata/RHSA-2018:3431
Comment 7 errata-xmlrpc 2018-10-31 04:44:45 EDT
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.4 for RHEL 7
  Native Client for RHEL 7 for Red Hat Storage

Via RHSA-2018:3432 https://access.redhat.com/errata/RHSA-2018:3432
Comment 8 Siddharth Sharma 2018-11-01 01:23:55 EDT
upstream fix:

https://review.gluster.org/#/c/glusterfs/+/21530/
Comment 9 errata-xmlrpc 2018-11-05 09:58:38 EST
This issue has been addressed in the following products:

  Red Hat Virtualization 4 for Red Hat Enterprise Linux 7

Via RHSA-2018:3470 https://access.redhat.com/errata/RHSA-2018:3470

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