USN-3731-1: LFTP vulnerability

06 August 2018

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



  • lftp - Sophisticated command-line FTP/HTTP client programs
  • lftp - Sophisticated command-line FTP/HTTP/BitTorrent client programs


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
Ubuntu 16.04
Ubuntu 14.04

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


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