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AUSCERT External Security Bulletin Redistribution
ESB-2019.2520
USN-4053-1: GVfs vulnerabilities
10 July 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: GVfs
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Increased Privileges -- Existing Account
Provide Misleading Information -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-12795 CVE-2019-12449 CVE-2019-12448
CVE-2019-12447
Reference: ESB-2019.2393
ESB-2019.2192
Original Bulletin:
https://usn.ubuntu.com/4053-1/
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USN-4053-1: GVfs vulnerabilities
9 July 2019
gvfs vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
o Ubuntu 18.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in GVfs.
Software Description
o 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
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-12447
o CVE-2019-12448
o CVE-2019-12449
o CVE-2019-12795
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