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Ubuntu Security Notice USN-3827-2

Ubuntu Security Notice USN-3827-2
Posted Nov 28, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3827-2 - USN-3827-1 fixed a vulnerability in samba. This update provides the corresponding update for Ubuntu 12.04 ESM. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2018-14629, CVE-2018-16841, CVE-2018-16851
MD5 | 590885474e10b4feca61644f7fdbb68a

Ubuntu Security Notice USN-3827-2

Change Mirror Download
==========================================================================
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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