USN-3810-1: ppp vulnerability

6 November 2018

ppp vulnerability

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

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


ppp could be made to crash or bypass authentication if it received specially crafted network traffic.

Software Description

  • ppp - Point-to-Point Protocol (PPP)


Ivan Gotovchits discovered that ppp incorrectly handled the EAP-TLS protocol. A remote attacker could use this issue to cause ppp to crash, resulting in a denial of service, or possibly bypass authentication.

Update instructions

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

Ubuntu 18.04 LTS
ppp - 2.4.7-2+2ubuntu1.1
Ubuntu 16.04 LTS
ppp - 2.4.7-1+2ubuntu1.16.04.1
Ubuntu 14.04 LTS
ppp - 2.4.5-5.1ubuntu2.3

To update your system, please follow these instructions:

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