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CVE-2018-4020

HIGHCVSS 7.2/10EPSS 48.72%

Last modified

CVE-2018-4020 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. An exploitable command injection vulnerability exists in the way Netgate pfSense CE 2.4.4-RELEASE processes the parameters of a specific POST request. The attacker can exploit this and gain the ability to execute arbitrary commands on the system. EPSS estimates a 48.72% chance of exploitation in the next 30 days.

Description

An exploitable command injection vulnerability exists in the way Netgate pfSense CE 2.4.4-RELEASE processes the parameters of a specific POST request. The attacker can exploit this and gain the ability to execute arbitrary commands on the system. An attacker needs to be able to send authenticated POST requests to the administration web interface. Command injection is possible in the `powerd_ac_mode` POST parameter parameter.

Metrics

CVSS 3.1
7.2/10

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

EPSS Probability
48.72%

98.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
NetgatePfsense2.4.4

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-4020?
An exploitable command injection vulnerability exists in the way Netgate pfSense CE 2.4.4-RELEASE processes the parameters of a specific POST request. The attacker can exploit this and gain the ability to execute arbitrary commands on the system. An attacker needs to be able to send authenticated POST requests to the administration web interface. Command injection is possible in the `powerd_ac_mode` POST parameter parameter.
How severe is CVE-2018-4020?
CVE-2018-4020 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 48.72% probability of exploitation in the next 30 days.
How do I fix CVE-2018-4020?
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-2018-4020?

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

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Source: NVD / NIST