[USN-5260-3] Samba vulnerability

[Leonidas S. Barbosa]

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Ubuntu Security Notice USN-5260-3
February 03, 2022

samba vulnerability
==========================================================================

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

- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

Samba could be made to crash when handled certain memory operations.

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

Details:

USN-5260-1 fixed a vulnerability in Samba. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

 Orange Tsai discovered that the Samba vfs_fruit module incorrectly handled
 certain memory operations. A remote attacker could use this issue to cause
 Samba to crash, resulting in a denial of service, or possibly execute
 arbitrary code as root. (CVE-2021-44142)

Update instructions:

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

Ubuntu 16.04 ESM:
  samba                           2:4.3.11+dfsg-0ubuntu0.16.04.34+esm1

Ubuntu 14.04 ESM:
  samba                           2:4.3.11+dfsg-0ubuntu0.14.04.20+esm12

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References:
  https://ubuntu.com/security/notices/USN-5260-3
  https://ubuntu.com/security/notices/USN-5260-1
  CVE-2021-44142
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