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AUSCERT External Security Bulletin Redistribution
ESB-2019.1178
Samba vulnerability
9 April 2019
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AusCERT Security Bulletin Summary
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Product: samba
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Create Arbitrary Files -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-3880
Reference: ESB-2019.1176
Original Bulletin:
http://www.ubuntu.com/usn/usn-3939-1
http://www.ubuntu.com/usn/usn-3939-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
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Ubuntu Security Notice USN-3939-1
April 08, 2019
samba vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 18.10
- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
Samba could be made to create files in unexpected locations.
Software Description:
- - samba: SMB/CIFS file, print, and login server for Unix
Details:
Michael Hanselmann discovered that Samba incorrectly handled registry
files. A remote attacker could possibly use this issue to create new
registry files outside of the share, contrary to expectations.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.10:
libsmbclient 2:4.8.4+dfsg-2ubuntu2.3
samba 2:4.8.4+dfsg-2ubuntu2.3
Ubuntu 18.04 LTS:
libsmbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.9
samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.9
Ubuntu 16.04 LTS:
libsmbclient 2:4.3.11+dfsg-0ubuntu0.16.04.19
samba 2:4.3.11+dfsg-0ubuntu0.16.04.19
Ubuntu 14.04 LTS:
libsmbclient 2:4.3.11+dfsg-0ubuntu0.14.04.20
samba 2:4.3.11+dfsg-0ubuntu0.14.04.20
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3939-1
CVE-2019-3880
Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.8.4+dfsg-2ubuntu2.3
https://launchpad.net/ubuntu/+source/samba/2:4.7.6+dfsg~ubuntu-0ubuntu2.9
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.19
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.14.04.20
==============================================================================
==========================================================================
Ubuntu Security Notice USN-3939-2
April 08, 2019
samba vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 12.04 ESM
Summary:
Samba could be made to create files in unexpected locations.
Software Description:
- - samba: SMB/CIFS file, print, and login server for Unix
Details:
USN-3939-1 fixed a vulnerability in Samba. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
 Michael Hanselmann discovered that Samba incorrectly handled registry
 files. A remote attacker could possibly use this issue to create new
 registry files outside of the share, contrary to expectations.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
 libsmbclient                     2:3.6.25-0ubuntu0.12.04.17
 samba                        2:3.6.25-0ubuntu0.12.04.17
In general, a standard system update will make all the necessary
changes.
References:
 https://usn.ubuntu.com/usn/usn-3939-2
 https://usn.ubuntu.com/usn/usn-3939-1
 CVE-2019-3880
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