Security restrictions bypass in libfuse - CVE-2018-10906

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Main Vulnerability Database Vulnerabilities #VU14103

Security restrictions bypass in libfuse - CVE-2018-10906

Published: July 30, 2018


Vulnerability identifier: #VU14103
CSH Severity: Low
CVSS v4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-10906
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The weakness exists due to insufficient access and privileges controls. A remote attacker can mount a FUSE file system with the 'allow_other' mount option regardless of whether 'user_allow_other' is set in the fuse configuration when SELinux is active, trick them into accessing files on that file system, bypass security restrictions and possibly cause the service to crash.


Affected software

libfuse
Debian Linux
Amazon Linux AMI
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power
Opensuse
Fedora
fuse (Alpine package)
fuse3 (Alpine package)
fuse

How to mitigate CVE-2018-10906

Update to version 3.2.5.

libfuse - update to 3.2.5
fuse (Alpine package) - update to 2.9.8-r0
fuse3 (Alpine package) - update to 3.2.5-r0
fuse - addressed in versions 2.9.9-1.fc28, 2.9.9-1.fc29, 2.9.9-1.fc30

External References

Related Security Bulletins