USN-4540-1: atftpd vulnerabilities

24 September 2020

Several security issues were fixed in atftpd.

Releases

Packages

  • atftp - Advanced TFTP Server and Client

Details

Denis Andzakovic discovered that atftpd incorrectly handled certain
malformed packets. A remote attacker could send a specially crafted packet
to cause atftpd to crash, resulting in a denial of service.
(CVE-2019-11365)

Denis Andzakovic discovered that atftpd did not properly lock the thread
list mutex. An attacker could send a large number of tftpd packets
simultaneously when running atftpd in daemon mode to cause atftpd to
crash, resulting in a denial of service. (CVE-2019-11366)

Update instructions

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

Ubuntu 18.04

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

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