CVE-2018-11574

Publication date 14 June 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files. Configurations that use the `refuse-app` option are unaffected.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ppp	18.10 cosmic	Fixed 2.4.7-2+3ubuntu1
	18.04 LTS bionic	Fixed 2.4.7-2+2ubuntu1.1
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Fixed 2.4.7-1+2ubuntu1.16.04.1
	14.04 LTS trusty	Fixed 2.4.5-5.1ubuntu2.3

Notes

mdeslaur

the EAP-TLS patch is an Ubuntu-specific change in earlier releases

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-3810-1
ppp vulnerability
6 November 2018