#VU14103 Security restrictions bypass in libfuse


Published: 2018-07-30

Vulnerability identifier: #VU14103

Vulnerability risk: Low

CVSSv3.1: 6.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10906

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libfuse
Universal components / Libraries / Libraries used by multiple products

Vendor: libfuse

Description

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.

Mitigation
Update to version 3.2.5.

Vulnerable software versions

libfuse: 2.9.8 - 3.2.4

External links
http://github.com/libfuse/libfuse/commit/28bdae3d113ef479c1660a581ef720cdc33bf466
http://github.com/libfuse/libfuse/commit/5018a0c016495155ee598b7e0167b43d5d902414

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability


Amazon Linux AMI update for fuse
Red Hat update for fuse
OpenSUSE Linux update for fuse
OpenSUSE Linux update for fuse
Debian update for fuse
Security restrictions bypass in libfuse
Security restrictions bypass in fuse (Alpine package)
Security restrictions bypass in fuse3 (Alpine package)