A Samba security update has been released for Ubuntu Linux 18.04 LTS.

==========================================================================
Ubuntu Security Notice USN-5260-2
February 01, 2022

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

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

- Ubuntu 18.04 LTS

Summary:

Samba could be made to crash or run programs as an administrator if it
received specially crafted network traffic.

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

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 18.04 LTS:
samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.28

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

References:
  https://ubuntu.com/security/notices/USN-5260-2
  https://ubuntu.com/security/notices/USN-5260-1
CVE-2021-44142

Package Information:
  https://launchpad.net/ubuntu/+source/samba/2:4.7.6+dfsg~ubuntu-0ubuntu2.28