Ubuntu Security Notice 3939-1 - 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.
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Ubuntu Security Notice USN-3939-1
April 08, 2019
samba vulnerability
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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