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AUSCERT External Security Bulletin Redistribution
ESB-2017.1758
Samba vulnerability
17 July 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: samba-libs
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-11103
Reference: ESB-2017.1741
ESB-2017.1756
Original Bulletin:
http://www.ubuntu.com/usn/usn-3353-2
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Ubuntu Security Notice USN-3353-2
July 14, 2017
samba vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 17.04
- - Ubuntu 16.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
Samba could allow unintended access to network services.
Software Description:
- - samba: SMB/CIFS file, print, and login server for Unix
Details:
USN-3353-1 fixed a vulnerability in Heimdal. This update provides
the corresponding update for Samba.
Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered
that Samba clients incorrectly trusted unauthenticated portions of
Kerberos tickets. A remote attacker could use this to impersonate
trusted network servers or perform other attacks.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 17.04:
samba-libs 2:4.5.8+dfsg-0ubuntu0.17.04.4
Ubuntu 16.10:
samba-libs 2:4.4.5+dfsg-2ubuntu5.8
Ubuntu 16.04 LTS:
samba-libs 2:4.3.11+dfsg-0ubuntu0.16.04.9
Ubuntu 14.04 LTS:
samba-libs 2:4.3.11+dfsg-0ubuntu0.14.04.10
In general, a standard system update will make all the necessary changes.
References:
https://www.ubuntu.com/usn/usn-3353-2
https://www.ubuntu.com/usn/usn-3353-1
CVE-2017-11103
Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.5.8+dfsg-0ubuntu0.17.04.4
https://launchpad.net/ubuntu/+source/samba/2:4.4.5+dfsg-2ubuntu5.8
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.9
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.14.04.10
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