CVE-2019-16889
7.5 · HIGHOverview
CVE-2019-16889 is a high-severity vulnerability affecting ui er-x_firmware. It was published on September 25, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from ui. Update er-x_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| ui | er-x_firmware | >= 0, < 2.0.3 | Affected |
| ui | er-x-sfp_firmware | >= 0, < 2.0.3 | Affected |
| ui | ep-r6_firmware | >= 0, < 2.0.3 | Affected |
| ui | erlite-3_firmware | >= 0, < 2.0.3 | Affected |
| ui | erpoe-5_firmware | >= 0, < 2.0.3 | Affected |
| ui | er-8_firmware | >= 0, < 2.0.3 | Affected |
| ui | erpro-8_firmware | >= 0, < 2.0.3 | Affected |
| ui | ep-r8_firmware | >= 0, < 2.0.3 | Affected |
| ui | er-4_firmware | >= 0, < 2.0.3 | Affected |
| ui | er-6p_firmware | >= 0, < 2.0.3 | Affected |
References
Frequently Asked Questions
What is CVE-2019-16889?
CVE-2019-16889 is a high-severity vulnerability affecting ui er-x_firmware. It was published on September 25, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2019-16889?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2019-16889?
Check the references section for vendor advisories and patches from ui. Update er-x_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-16889?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-16889 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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