CVE-2018-18898

Name: CVE-2018-18898
Creator: NVD / NIST
Published: 2019-03-21T16:00:29.873+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.36%

Last modified Jun 17, 2026

CVE-2018-18898 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of service by remote attackers via an algorithmic complexity attack on email address parsing.. EPSS estimates a 2.36% chance of exploitation in the next 30 days.

Description

The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of service by remote attackers via an algorithmic complexity attack on email address parsing.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.36%

81.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Bestpractical	Request Tracker	>= 4.1.13, <= 4.4.0
Fedoraproject	Fedora	28
Fedoraproject	Fedora	29
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Debian	Debian Linux	8.0
Debian	Debian Linux	10.0

References

https://bestpractical.com/download-pageProduct, Release Notes
https://lists.debian.org/debian-lts-announce/2020/02/msg00009.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CPJVDT77ZPRU5Z2BEMZM7EBY6WZHUATZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YR46PPHBEM76DNN4DEQMAYIKLCO3TQU2/
https://usn.ubuntu.com/4517-1/Third Party Advisory
https://bestpractical.com/download-pageProduct, Release Notes
https://lists.debian.org/debian-lts-announce/2020/02/msg00009.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CPJVDT77ZPRU5Z2BEMZM7EBY6WZHUATZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YR46PPHBEM76DNN4DEQMAYIKLCO3TQU2/
https://usn.ubuntu.com/4517-1/Third Party Advisory

Timeline

Published: Mar 21, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18898?

The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of service by remote attackers via an algorithmic complexity attack on email address parsing.

How severe is CVE-2018-18898?

CVE-2018-18898 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.36% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18898?

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.

Are you affected by CVE-2018-18898?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST