Ubuntu 19.04, 18.10, 18.04 LTS, 16.04 LTS: 4053-1 Moderate: GVfs Issues

ubuntu

July 9, 2019

Several security issues were fixed in GVfs.

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)

Topics Covered

security advisory authentication issue ubuntu gvfs files ownership issue

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.