[USN-3731-1] LFTP vulnerability

[Leonidas S. Barbosa]

==========================================================================
Ubuntu Security Notice USN-3731-1
August 06, 2018

lftp vulnerability
==========================================================================

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

LFTP could be made to crash if it received specially crafted file.

Software Description:
- lftp: Sophisticated command-line FTP/HTTP/BitTorrent client programs

Details:

It was discovered that LFTP incorrectly handled certain files.
An attacker could possibly use this issue to cause a denial of service.

Update instructions:

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

Ubuntu 18.04 LTS:
  lftp                            4.8.1-1ubuntu0.1

Ubuntu 16.04 LTS:
  lftp                            4.6.3a-1ubuntu0.1

Ubuntu 14.04 LTS:
  lftp                            4.4.13-1ubuntu0.1

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

References:
  https://usn.ubuntu.com/usn/usn-3731-1
  CVE-2018-10196

Package Information:
  https://launchpad.net/ubuntu/+source/lftp/4.8.1-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/lftp/4.6.3a-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/lftp/4.4.13-1ubuntu0.1
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