CVE-2019-16889

Name: CVE-2019-16889
Creator: NVD / NIST
Published: 2019-09-25T20:15:11.12+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 5.09%

Last modified Jun 17, 2026

CVE-2019-16889 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Ubiquiti EdgeMAX devices before 2.0.3 allow remote attackers to cause a denial of service (disk consumption) because *.cache files in /var/run/beaker/container_file/ are created when providing a valid length payload of 249 characters or fewer to the beaker.session.id cookie in a GET header. The attacker can use a long series of unique session IDs.. EPSS estimates a 5.09% chance of exploitation in the next 30 days.

Description

Ubiquiti EdgeMAX devices before 2.0.3 allow remote attackers to cause a denial of service (disk consumption) because *.cache files in /var/run/beaker/container_file/ are created when providing a valid length payload of 249 characters or fewer to the beaker.session.id cookie in a GET header. The attacker can use a long series of unique session IDs.

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

5.09%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Ui	Er-X Firmware	< 2.0.3
Ui	Er-X-Sfp Firmware	< 2.0.3
Ui	Ep-R6 Firmware	< 2.0.3
Ui	Erlite-3 Firmware	< 2.0.3
Ui	Erpoe-5 Firmware	< 2.0.3
Ui	Er-8 Firmware	< 2.0.3
Ui	Erpro-8 Firmware	< 2.0.3
Ui	Ep-R8 Firmware	< 2.0.3
Ui	Er-4 Firmware	< 2.0.3
Ui	Er-6p Firmware	< 2.0.3
Ui	Er-12 Firmware	< 2.0.3
Ui	Er-8-Xg Firmware	< 2.0.3

References

https://community.ui.com/releases/New-EdgeRouter-firmware-2-0-3-has-been-released-2-0-3/e8badd28-a112-4269-9fb6-ffe3fc0e1643Patch, Vendor Advisory
https://hackerone.com/reports/406614Exploit, Issue Tracking, Third Party Advisory
https://mjlanders.com/2019/07/28/resource-consumption-dos-on-edgemax-v1-10-6/Exploit, Third Party Advisory
https://community.ui.com/releases/New-EdgeRouter-firmware-2-0-3-has-been-released-2-0-3/e8badd28-a112-4269-9fb6-ffe3fc0e1643Patch, Vendor Advisory
https://hackerone.com/reports/406614Exploit, Issue Tracking, Third Party Advisory
https://mjlanders.com/2019/07/28/resource-consumption-dos-on-edgemax-v1-10-6/Exploit, Third Party Advisory

Timeline

Published: Sep 25, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16889?

How severe is CVE-2019-16889?

CVE-2019-16889 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.09% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16889?

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-2019-16889?

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

Scan your code now

Source: NVD / NIST