Vulnerability CVE-2018-10906
Published: 2018-07-24

Description:
In fuse before versions 2.9.8 and 3.x before 3.2.5, fusermount is vulnerable to a restriction bypass when SELinux is active. This allows non-root users to mount a FUSE file system with the 'allow_other' mount option regardless of whether 'user_allow_other' is set in the fuse configuration. An attacker may use this flaw to mount a FUSE file system, accessible by other users, and trick them into accessing files on that file system, possibly causing Denial of Service or other unspecified effects.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
fusermount Restriction Bypass
Jann Horn
31.07.2018

Type:

CWE-269

 (Improper Privilege Management)

CVSS2 => (AV:L/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.6/10
6.4/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Redhat -> Enterprise linux desktop 
Redhat -> Enterprise linux server 
Redhat -> Enterprise linux workstation 
Fuse project -> FUSE 
Debian -> Debian linux 

 References:
https://access.redhat.com/errata/RHSA-2018:3324
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10906
https://lists.debian.org/debian-lts-announce/2018/08/msg00015.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5XYA6PXT5PPWVK7CM7K4YRCYWA37DODB/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A253TZWZK6R7PT2S5JIEAQJR2TYKX7V2/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BREAIWIK64DRJWHIGR47L2D5YICY4HQ3/
https://www.debian.org/security/2018/dsa-4257
https://www.exploit-db.com/exploits/45106/
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