CVE-2018-11574

Name: CVE-2018-11574
Creator: NVD / NIST
Published: 2018-06-14T20:29:00.253+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.90%

Last modified Jun 17, 2026

CVE-2018-11574 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 1.90% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.90%

77.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Point-To-Point Protocol Project	Point-To-Point Protocol	< 2.4.9
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04

References

http://www.openwall.com/lists/oss-security/2018/06/11/1Mailing List, Patch, Third Party Advisory
https://usn.ubuntu.com/3810-1/Third Party Advisory
http://www.openwall.com/lists/oss-security/2018/06/11/1Mailing List, Patch, Third Party Advisory
https://usn.ubuntu.com/3810-1/Third Party Advisory

Timeline

Published: Jun 14, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-11574?

How severe is CVE-2018-11574?

CVE-2018-11574 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.90% probability of exploitation in the next 30 days.

How do I fix CVE-2018-11574?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST