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==========================================================================
Ubuntu Security Notice USN-3827-2
November 27, 2018

samba vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in Samba.

Software Description:
- samba: SMB/CIFS file, print, and login server for Unix

Details:

USN-3827-1 fixed a vulnerability in samba. This update provides
the corresponding update for Ubuntu 12.04 ESM.


Original advisory details:

 Florian Stuelpner discovered that Samba incorrectly handled CNAME
 records. A remote attacker could use this issue to cause Samba to
 crash, resulting in a denial of service. (CVE-2018-14629)

 Alex MacCuish discovered that Samba incorrectly handled memory when
 configured to accept smart-card authentication. A remote attacker
 could possibly use this issue to cause Samba to crash, resulting in a
 denial of service. (CVE-2018-16841)

 Garming Sam discovered that Samba incorrectly handled memory when
 processing LDAP searches. A remote attacker could possibly use this
 issue to cause Samba to crash, resulting in a denial of service. 
 (CVE-2018-16851)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
  samba                           2:3.6.25-0ubuntu0.12.04.16

In general, a standard system update will make all the necessary
changes.

References:
  https://usn.ubuntu.com/usn/usn-3827-2
  https://usn.ubuntu.com/usn/usn-3827-1
  CVE-2018-14629, CVE-2018-16841, CVE-2018-16851
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