Executive Summary

Summary
Title GVfs vulnerabilities
Informations
Name USN-4053-1 First vendor Publication 2019-07-09
Vendor Ubuntu Last vendor Modification 2019-07-09
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 6.8 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04 - Ubuntu 18.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in GVfs.

Software Description: - gvfs: Userspace virtual filesystem

Details:

It was discovered that GVfs incorrectly handled the admin backend. Files created or moved by the admin backend could end up with the wrong ownership information, contrary to expectations. This issue only affected Ubuntu 18.04 LTS, Ubuntu 18.10, and Ubuntu 19.04. (CVE-2019-12447, CVE-2019-12448, CVE-2019-12449)

It was discovered that GVfs incorrectly handled authentication on its private D-Bus socket. A local attacker could possibly connect to this socket and issue D-Bus calls. (CVE-2019-12795)

Update instructions:

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

Ubuntu 19.04:
gvfs 1.40.1-1ubuntu0.1
gvfs-backends 1.40.1-1ubuntu0.1

Ubuntu 18.10:
gvfs 1.38.1-0ubuntu1.3.2
gvfs-backends 1.38.1-0ubuntu1.3.2

Ubuntu 18.04 LTS:
gvfs 1.36.1-0ubuntu1.3.3
gvfs-backends 1.36.1-0ubuntu1.3.3

Ubuntu 16.04 LTS:
gvfs 1.28.2-1ubuntu1~16.04.3
gvfs-backends 1.28.2-1ubuntu1~16.04.3

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

References:
https://usn.ubuntu.com/4053-1
CVE-2019-12447, CVE-2019-12448, CVE-2019-12449, CVE-2019-12795

Package Information:
https://launchpad.net/ubuntu/+source/gvfs/1.40.1-1ubuntu0.1
https://launchpad.net/ubuntu/+source/gvfs/1.38.1-0ubuntu1.3.2
https://launchpad.net/ubuntu/+source/gvfs/1.36.1-0ubuntu1.3.3
https://launchpad.net/ubuntu/+source/gvfs/1.28.2-1ubuntu1~16.04.3

Original Source

Url : http://www.ubuntu.com/usn/USN-4053-1

CWE : Common Weakness Enumeration

% Id Name
33 % CWE-755 Improper Handling of Exceptional Conditions
33 % CWE-362 Race Condition
33 % CWE-276 Incorrect Default Permissions

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Os 4
Os 2
Os 2

Alert History

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0
1
Date Informations
2019-09-20 21:22:28
  • Multiple Updates
2019-07-09 17:18:59
  • First insertion