Executive Summary

Summary
Titlefuse security update
Informations
NameRHSA-2011:1083First vendor Publication2011-07-20
VendorRedHatLast vendor Modification2011-07-20
Severity (Vendor) ModerateRevision01

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:P)
Cvss Base Score5.8Attack RangeNetwork
Cvss Impact Score4.9Attack ComplexityMedium
Cvss Expoit Score8.6AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated fuse packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

3. Description:

FUSE (Filesystem in Userspace) can implement a fully functional file system
in a user-space program. These packages provide the mount utility,
fusermount, the tool used to mount FUSE file systems.

Multiple flaws were found in the way fusermount handled the mounting and
unmounting of directories when symbolic links were present. A local user in
the fuse group could use these flaws to unmount file systems, which they
would otherwise not be able to unmount and that were not mounted using
FUSE, via a symbolic link attack. (CVE-2010-3879, CVE-2011-0541,
CVE-2011-0542, CVE-2011-0543)

Note: The util-linux-ng RHBA-2011:0699 update must also be installed to
fully correct the above flaws.

All users should upgrade to these updated packages, which contain
backported patches to correct these issues.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

651183 - CVE-2010-3879 CVE-2011-0541 CVE-2011-0542 CVE-2011-0543 fuse: unprivileged user can unmount arbitrary locations via symlink attack

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2011-1083.html

CWE : Common Weakness Enumeration

idName
CWE-264Permissions, Privileges, and Access Controls
CWE-59Improper Link Resolution Before File Access ('Link Following')

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:21871
 
Oval ID: oval:org.mitre.oval:def:21871
Title: RHSA-2011:1083: fuse security update (Moderate)
Description: Certain legacy functionality in fusermount in fuse 2.8.5 and earlier, when util-linux does not support the --no-canonicalize option, allows local users to bypass intended access restrictions and unmount arbitrary directories via a symlink attack.
Family: unix Class: patch
Reference(s): RHSA-2011:1083-01
CVE-2010-3879
CVE-2011-0541
CVE-2011-0542
CVE-2011-0543
Version: 55
Platform(s): Red Hat Enterprise Linux 6
Product(s): fuse
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23608
 
Oval ID: oval:org.mitre.oval:def:23608
Title: ELSA-2011:1083: fuse security update (Moderate)
Description: Certain legacy functionality in fusermount in fuse 2.8.5 and earlier, when util-linux does not support the --no-canonicalize option, allows local users to bypass intended access restrictions and unmount arbitrary directories via a symlink attack.
Family: unix Class: patch
Reference(s): ELSA-2011:1083-01
CVE-2010-3879
CVE-2011-0541
CVE-2011-0542
CVE-2011-0543
Version: 18
Platform(s): Oracle Linux 6
Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application34

OpenVAS Exploits

DateDescription
2012-06-06Name : RedHat Update for fuse RHSA-2011:1083-01
File : nvt/gb_RHSA-2011_1083-01_fuse.nasl
2011-03-07Name : Ubuntu Update for fuse vulnerabilities USN-1077-1
File : nvt/gb_ubuntu_USN_1077_1.nasl
2011-02-11Name : Fedora Update for util-linux-ng FEDORA-2011-0854
File : nvt/gb_fedora_2011_0854_util-linux-ng_fc14.nasl
2011-01-21Name : Ubuntu Update for fuse vulnerability USN-1045-1
File : nvt/gb_ubuntu_USN_1045_1.nasl
2011-01-21Name : Ubuntu Update for util-linux update USN-1045-2
File : nvt/gb_ubuntu_USN_1045_2.nasl

Open Source Vulnerability Database (OSVDB)

idDescription
74709Fuse Symlink Arbitrary Directory Unmount
74708Fuse Unspecified Timing Attack Current Directory Manipulation Weakness
74707Fuse --no-canonicalize Compatibility Fallback Insecure Mounting Weakness
70520Fuse fusermount Arbitrary Unmount Local DoS

Nessus® Vulnerability Scanner

DateDescription
2013-07-12Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2011-1083.nasl - Type : ACT_GATHER_INFO
2013-04-30Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2013-154.nasl - Type : ACT_GATHER_INFO
2012-08-01Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20110720_fuse_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2011-12-13Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_util-linux-and-fuse-201103-7418.nasl - Type : ACT_GATHER_INFO
2011-07-21Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2011-1083.nasl - Type : ACT_GATHER_INFO
2011-05-05Name : The remote SuSE system is missing a security patch for fuse
File : suse_11_2_fuse-110228.nasl - Type : ACT_GATHER_INFO
2011-04-01Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_util-linux-and-fuse-201103-7362.nasl - Type : ACT_GATHER_INFO
2011-03-31Name : The remote SuSE 11 host is missing one or more security updates.
File : suse_11_util-linux-and-fuse-201103-110302.nasl - Type : ACT_GATHER_INFO
2011-03-01Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1077-1.nasl - Type : ACT_GATHER_INFO
2011-02-08Name : The remote Fedora host is missing a security update.
File : fedora_2011-0854.nasl - Type : ACT_GATHER_INFO
2011-01-20Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1045-1.nasl - Type : ACT_GATHER_INFO
2011-01-20Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1045-2.nasl - Type : ACT_GATHER_INFO

Alert History

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DateInformations
2014-02-17 11:54:54
  • Multiple Updates