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Debian DSA-3451-1 : fuse - security update

high Nessus Plugin ID 88109

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Synopsis

The remote Debian host is missing a security-related update.

Description

Jann Horn discovered a vulnerability in the fuse (Filesystem in Userspace) package in Debian. The fuse package ships an udev rule adjusting permissions on the related /dev/cuse character device, making it world writable.

This permits a local, unprivileged attacker to create an arbitrarily-named character device in /dev and modify the memory of any process that opens it and performs an ioctl on it.

This in turn might allow a local, unprivileged attacker to escalate to root privileges.

Solution

Upgrade the fuse packages.

For the oldstable distribution (wheezy), the fuse package is not affected.

For the stable distribution (jessie), this problem has been fixed in version 2.9.3-15+deb8u2.

See Also

https://packages.debian.org/source/jessie/fuse

https://www.debian.org/security/2016/dsa-3451

Plugin Details

Severity: High

ID: 88109

File Name: debian_DSA-3451.nasl

Version: 2.9

Type: local

Agent: unix

Published: 1/25/2016

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:fuse, cpe:/o:debian:debian_linux:8.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 1/20/2016

Reference Information

CVE: CVE-2016-1233

DSA: 3451