CVE-2024-57273: pfsense ce XSS — Exploit

Description

Netgate pfSense CE (prior to 2.8.0 beta release) and corresponding Plus builds is vulnerable to Cross-site scripting (XSS) in the Automatic Configuration Backup (ACB) service, allowing remote attackers to execute arbitrary JavaScript, delete backups, or leak sensitive information via an unsanitized "reason" field and a derivable device key generated from the public SSH key.

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CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
netgate	pfsense_ce	< 2.8.0
netgate	pfsense_plus	< 25.03

References

Exploits

https://blog.brillantit.com/exploiting-pfsense-xss-command-injection-cloud-hijack/

Other References

http://netgate.com https://docs.netgate.com/downloads/pfSense-SA-25_03.webgui.asc https://www.netgate.com/blog/important-security-updates-for-pfsense-plus-24.11-and-ce-2.7.2

Frequently Asked Questions

What is CVE-2024-57273? +

Netgate pfSense CE (prior to 2.8.0 beta release) and corresponding Plus builds is vulnerable to Cross-site scripting (XSS) in the Automatic Configuration Backup (ACB) service, allowing remote attackers to execute arbitrary JavaScript, delete backups, or leak sensitive information via an unsanitized "reason" field and a derivable device key generated from the public SSH key. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2024-57273? +

CVE-2024-57273 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-57273? +

CVE-2024-57273 affects products from netgate, specifically: pfsense_ce, pfsense_plus. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-57273? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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