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Ubuntu Security Notice USN-3731-2
August 06, 2018

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

- Ubuntu 12.04 ESM

Summary:

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

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

Details:

USN-3731-1 fixed a vulnerability in LFTP. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory 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 12.04 ESM:
  lftp                            4.3.3-1ubuntu0.1

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

References:
  https://usn.ubuntu.com/usn/usn-3731-2
  https://usn.ubuntu.com/usn/usn-3731-1
  CVE-2018-10916