USN-4121-1: Samba vulnerability

3 September 2019

samba vulnerability

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

  • Ubuntu 19.04

Summary

Samba would allow unintended access to files over the network.

Software Description

  • samba - SMB/CIFS file, print, and login server for Unix

Details

Stefan Metzmacher discovered that the Samba SMB server did not properly prevent clients from escaping outside the share root directory in some situations. An attacker could use this to gain access to files outside of the Samba share, where allowed by the permissions of the underlying filesystem.

Update instructions

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

Ubuntu 19.04
samba - 2:4.10.0+dfsg-0ubuntu2.4

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.

References