Bug 1613143 (CVE-2018-10926) - CVE-2018-10926 glusterfs: Device files can be created in arbitrary locations
Summary: CVE-2018-10926 glusterfs: Device files can be created in arbitrary locations
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-10926
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: 1613686 1616829 1625086 1625088
Blocks: 1609600
TreeView+ depends on / blocked
 
Reported: 2018-08-07 06:16 UTC by Sam Fowler
Modified: 2021-02-16 23:48 UTC (History)
29 users (show)

Fixed In Version: glusterfs-3.12.14, glusterfs-4.1.4
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in RPC request using gfs3_mknod_req supported by glusterfs server. An authenticated attacker could use this flaw to write files to an arbitrary location via path traversal and execute arbitrary code on a glusterfs server node.
Clone Of:
Environment:
Last Closed: 2019-06-10 10:35:28 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2607 0 None None None 2018-09-04 06:25:44 UTC
Red Hat Product Errata RHSA-2018:2608 0 None None None 2018-09-04 06:27:05 UTC
Red Hat Product Errata RHSA-2018:3470 0 None None None 2018-11-05 14:58:18 UTC

Description Sam Fowler 2018-08-07 06:16:01 UTC 
The Gluster filesystem allows for device files to be created in arbitrary locations via a mounted volume. This can be exploited by users with access to the storage server to read and write to the entire disk.
Comment 1 Sam Fowler 2018-08-07 06:16:13 UTC 
Acknowledgments:

Name: Michael Hanselmann (hansmi.ch)
Comment 4 Doran Moppert 2018-08-16 01:55:13 UTC 
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. For Red Hat Virtualization, Product Security has rated this flaw as Moderate. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Comment 6 Siddharth Sharma 2018-09-04 05:44:47 UTC 
Created glusterfs tracking bugs for this issue:

Affects: fedora-all [bug 1625086]
Comment 8 errata-xmlrpc 2018-09-04 06:25:32 UTC 
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-2018:2607 https://access.redhat.com/errata/RHSA-2018:2607
Comment 9 errata-xmlrpc 2018-09-04 06:26:54 UTC 
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-2018:2608 https://access.redhat.com/errata/RHSA-2018:2608
Comment 10 Siddharth Sharma 2018-09-04 14:55:32 UTC 
Mitigation:

To limit exposure of gluster server nodes :  

1. gluster server should be on LAN and not reachable from public networks.  
2. Use gluster auth.allow and auth.reject.  
3. Use TLS certificates to authenticate gluster clients.

caveat: This does not protect from attacks by authenticated gluster clients.
Comment 11 Siddharth Sharma 2018-09-05 07:43:44 UTC 
upstream fix:

https://review.gluster.org/21068
Comment 12 errata-xmlrpc 2018-11-05 14:58:05 UTC 
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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