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Bug 1607617 - (CVE-2018-10914) CVE-2018-10914 glusterfs: remote denial of service of gluster volumes via posix_get_file_contents function in posix-helpers.c
CVE-2018-10914 glusterfs: remote denial of service of gluster volumes via pos...
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=20180904:0530,...
: Security
Depends On: 1616829 1625077 1608366 1610122 1625075
Blocks: 1607620
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Reported: 2018-07-23 16:22 EDT by Laura Pardo
Modified: 2018-10-02 03:19 EDT (History)
32 users (show)

See Also:
Fixed In Version: glusterfs-3.12.14, glusterfs-4.1.4
Doc Type: If docs needed, set a value
Doc Text:
It was found that an attacker could issue a xattr request via glusterfs FUSE to cause gluster brick process to crash which will result in a remote denial of service. If gluster multiplexing is enabled this will result in a crash of multiple bricks and gluster volumes.
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RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2607 None None None 2018-09-04 02:24 EDT
Red Hat Product Errata RHSA-2018:2608 None None None 2018-09-04 02:26 EDT

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Description Laura Pardo 2018-07-23 16:22:33 EDT 
A flaw was found in GlusterFS. A NULL pointer dereference vulnerability due to an improper implementation of the posix_get_file_contents function. An attacker could exploit this to perform a Denial of Service attack.
Comment 1 Laura Pardo 2018-07-24 12:45:13 EDT 
Acknowledgments:

Name: Michael Hanselmann (hansmi.ch)
Comment 8 errata-xmlrpc 2018-09-04 02:24:46 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-2018:2607 https://access.redhat.com/errata/RHSA-2018:2607
Comment 9 errata-xmlrpc 2018-09-04 02:25:55 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-2018:2608 https://access.redhat.com/errata/RHSA-2018:2608
Comment 10 Siddharth Sharma 2018-09-04 10:30:55 EDT 
upstream fix:

https://review.gluster.org/21071
Comment 11 Siddharth Sharma 2018-09-04 10:31:19 EDT 
Mitigation:

SELinux mitigates this issue on Red Hat Gluster Storage 3. SELinux should be in enforcing mode only as permissive mode does not block attacks.
Comment 13 Doran Moppert 2018-09-06 01:04:43 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.
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