USN-3426-1: Samba vulnerabilities
Ubuntu Security Notice USN-3426-1
21st September, 2017
samba vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary
Samba could be made to expose sensitive information over the network.
Software description
- samba
– SMB/CIFS file, print, and login server for Unix
Details
Stefan Metzmacher discovered that Samba incorrectly enforced SMB signing in
certain situations. A remote attacker could use this issue to perform a man
in the middle attack. (CVE-2017-12150)
Stefan Metzmacher discovered that Samba incorrectly handled encryption
across DFS redirects. A remote attacker could use this issue to perform a
man in the middle attack. (CVE-2017-12151)
Yihan Lian and Zhibin Hu discovered that Samba incorrectly handled memory
when SMB1 is being used. A remote attacker could possibly use this issue to
obtain server memory contents. (CVE-2017-12163)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 17.04:
-
samba
2:4.5.8+dfsg-0ubuntu0.17.04.7
- Ubuntu 16.04 LTS:
-
samba
2:4.3.11+dfsg-0ubuntu0.16.04.11
- Ubuntu 14.04 LTS:
-
samba
2:4.3.11+dfsg-0ubuntu0.14.04.12
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.
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