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Ubuntu Security Notice USN-4121-1

Ubuntu Security Notice USN-4121-1
Posted Sep 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4121-1 - 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.

tags | advisory, root
systems | linux, ubuntu
advisories | CVE-2019-10197
SHA-256 | 1367c76bd694c824968013e80840ec4423f8c145a8687f47480c0f08138b555d

Ubuntu Security Notice USN-4121-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4121-1
September 03, 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

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

References:
https://usn.ubuntu.com/4121-1
CVE-2019-10197

Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.10.0+dfsg-0ubuntu2.4
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