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Bug 1601298 - (CVE-2018-10904) CVE-2018-10904 glusterfs: Unsanitized file names in debug/io-stats translator can allow remote attackers to execute arbitrary code
CVE-2018-10904 glusterfs: Unsanitized file names in debug/io-stats translator...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20180904:0530...
: Security
Depends On: 1616829 1605086 1607719 1625103 1625106 1625660
Blocks: 1601299
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Reported: 2018-07-15 21:59 EDT by Sam Fowler
Modified: 2018-10-02 03:19 EDT (History)
37 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 glusterfs server does not properly sanitize file paths in the "trusted.io-stats-dump" extended attribute which is used by the "debug/io-stats" translator. An attacker can use this flaw to create files and execute arbitrary code. To exploit this, the attacker would require sufficient access to modify the extended attributes of files on a gluster volume.
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RHEL 7.3 requirements from Atomic Host:
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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 02:25 EDT

  None (edit)
Description Sam Fowler 2018-07-15 21:59:18 EDT 
GlusterFS does not properly sanitize file paths in the "trusted.io-stats-dump" extended attribute (xattr) as used by the "debug/io-stats" translator. The value of this extended attribute is not properly sanitized and can be exploited by an attacker to create files in arbitrary locations and subsequently execute arbitrary code. To exploit this an attacker would require sufficient access to modify the extended attributes of files on a Gluster volume.
Comment 1 Sam Fowler 2018-07-16 03:48:42 EDT 
Acknowledgments:

Name: Michael Hanselmann (hansmi.ch)
Comment 13 Doran Moppert 2018-07-22 22:57:39 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. 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 17 errata-xmlrpc 2018-09-04 02:24:24 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 18 errata-xmlrpc 2018-09-04 02:25:32 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 19 Siddharth Sharma 2018-09-04 02:33:34 EDT 
Created glusterfs tracking bugs for this issue:

Affects: fedora-all [bug 1625103]
Comment 20 Siddharth Sharma 2018-09-04 03:52:29 EDT 
upstream fix:

https://review.gluster.org/21072
Comment 21 Siddharth Sharma 2018-09-04 09:39:03 EDT 
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 against authenticated gluster clients.
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