CVE-2018-10914

Impact:
Moderate
Public Date:
2018-09-04
CWE:
CWE-476
Bugzilla:
1607617: CVE-2018-10914 glusterfs: remote denial of service of gluster volumes via posix_get_file_contents function in posix-helpers.c
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.

Find out more about CVE-2018-10914 from the MITRE CVE dictionary dictionary and NIST NVD.

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.

CVSS v3 metrics

CVSS3 Base Score 5.5
CVSS3 Base Metrics CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack Vector Adjacent Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Impact Low
Availability Impact Low

Red Hat Security Errata

Platform Errata Release Date
Red Hat Gluster Storage 3.4 for RHEL 6 (glusterfs) RHSA-2018:2608 2018-09-04
Red Hat Storage Native Client for Red Hat Enterprise Linux 6 (glusterfs) RHSA-2018:2608 2018-09-04
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts RHSA-2018:3470 2018-11-05
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts RHSA-2018:2607 2018-09-04
Red Hat Storage Native Client for Red Hat Enterprise Linux 7 (glusterfs) RHSA-2018:2607 2018-09-04
Red Hat Gluster Storage 3.4 for RHEL 7 (glusterfs) RHSA-2018:2607 2018-09-04

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 glusterfs Affected
Red Hat Enterprise Linux 7 glusterfs Not affected
Red Hat Enterprise Linux 6 glusterfs Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

Acknowledgements

Red Hat would like to thank Michael Hanselmann (hansmi.ch) for reporting this issue.

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.

Last Modified