CVE-2018-14642

Name: CVE-2018-14642
Creator: NVD / NIST
Published: 2018-09-18T13:29:00.97+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 2.11%

Last modified Jun 17, 2026

CVE-2018-14642 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An information leak vulnerability was found in Undertow. If all headers are not written out in the first write() call then the code that handles flushing the buffer will always write out the full contents of the writevBuffer buffer, which may contain data from previous requests.. EPSS estimates a 2.11% chance of exploitation in the next 30 days.

Description

An information leak vulnerability was found in Undertow. If all headers are not written out in the first write() call then the code that handles flushing the buffer will always write out the full contents of the writevBuffer buffer, which may contain data from previous requests.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

2.11%

79.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Undertow	All versions
Redhat	Jboss Enterprise Application Platform	7.1
Redhat	Jboss Enterprise Application Platform	7.2
Redhat	Jboss Enterprise Application Platform	7.3

References

https://access.redhat.com/errata/RHSA-2019:0362Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:0364Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:0365Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:0380Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1106Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1107Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1108Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1140Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642Issue Tracking, Patch, Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:0362Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:0364Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:0365Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:0380Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1106Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1107Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1108Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1140Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Sep 18, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-14642?

How severe is CVE-2018-14642?

CVE-2018-14642 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 2.11% probability of exploitation in the next 30 days.

How do I fix CVE-2018-14642?

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-2018-14642?

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

Scan your code now

Source: NVD / NIST