Executive Summary

Summary
Title FUSE vulnerabilities
Informations
NameUSN-1077-1First vendor Publication2011-02-28
VendorUbuntuLast vendor Modification2011-02-28
Severity (Vendor) N/ARevisionN/A

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:N/I:P/A:P)
Cvss Base Score3.3Attack RangeLocal
Cvss Impact Score4.9Attack ComplexityMedium
Cvss Expoit Score3.4AuthentificationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects the following Ubuntu releases:

Ubuntu 8.04 LTS
Ubuntu 9.10
Ubuntu 10.04 LTS
Ubuntu 10.10

This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.

The problem can be corrected by upgrading your system to the
following package versions:

Ubuntu 8.04 LTS:
fuse-utils 2.7.2-1ubuntu2.3

Ubuntu 9.10:
fuse-utils 2.7.4-1.1ubuntu4.5

Ubuntu 10.04 LTS:
fuse-utils 2.8.1-1.1ubuntu3.1

Ubuntu 10.10:
fuse-utils 2.8.4-1ubuntu1.3

In general, a standard system update will make all the necessary changes.

Details follow:

It was discovered that FUSE would incorrectly follow symlinks when checking
mountpoints under certain conditions. A local attacker, with access to use
FUSE, could unmount arbitrary locations, leading to a denial of service.


Original Source

Url : http://www.ubuntu.com/usn/USN-1077-1

CWE : Common Weakness Enumeration

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

CPE : Common Platform Enumeration

TypeDescriptionCount
Application33

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

Alert History

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0
DateInformations
2013-05-11 00:54:09
  • Multiple Updates