Ubuntu alert USN-4707-1 (tcmu)

From:
             
 
Paulo Flabiano Smorigo <pfsmorigo@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-4707-1] TCMU vulnerability
Date:
             
 
Thu, 28 Jan 2021 11:02:49 -0300
Message-ID:
             
 
<20210128140249.olc2bwm2qizasni3@morty>
==========================================================================
Ubuntu Security Notice USN-4707-1
January 28, 2021

tcmu vulnerability
==========================================================================

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS

Summary:

tcmu could be made to crash if it received specially crafted
input.

Software Description:
- tcmu: TCM-Userspace backend

Details:

It was discovered that TCMU lacked a check for transport-layer restrictions,
allowing remote attackers to read or write files via directory traversal in
an XCOPY request.

Update instructions:

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

Ubuntu 20.10:
  libtcmu2                        1.5.2-5ubuntu0.20.10.1
  tcmu-runner                     1.5.2-5ubuntu0.20.10.1

Ubuntu 20.04 LTS:
  libtcmu2                        1.5.2-5ubuntu0.20.04.1
  tcmu-runner                     1.5.2-5ubuntu0.20.04.1

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

References:
  https://usn.ubuntu.com/4707-1
  CVE-2021-3139

Package Information:
  https://launchpad.net/ubuntu/+source/tcmu/1.5.2-5ubuntu0....
  https://launchpad.net/ubuntu/+source/tcmu/1.5.2-5ubuntu0....
-- 
ubuntu-security-announce mailing list
ubuntu-security-announce@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/ubuntu-security...