CVE-2025-34173: pfsense Path Traversal — Fix

Description

In pfSense CE /usr/local/www/snort/snort_ip_reputation.php, the value of the iplist parameter is not sanitized of directory traversal-related characters/strings before being used to check if a file exists. While the contents of the file cannot be read, the server reveals whether a file exists, which allows an attacker to enumerate files on the target. The attacker must be authenticated with at least "WebCfg - Services: Snort package" permissions.

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CVSS v3.1 Score

4.3

MEDIUM

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

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
pfsense	pfsense	< 2.8.0

References

Advisories & Patches

https://github.com/pfsense/FreeBSD-ports/commit/d6f462bcc446969f8955c16cfde300d5c9ab7435

Other References

https://redmine.pfsense.org/issues/16412 https://www.vulncheck.com/advisories/netgate-pf-sense-ce-snort-directory-traversal-information-disclosure

Frequently Asked Questions

What is CVE-2025-34173? +

In pfSense CE /usr/local/www/snort/snort_ip_reputation.php, the value of the iplist parameter is not sanitized of directory traversal-related characters/strings before being used to check if a file exists. While the contents of the file cannot be read, the server reveals whether a file exists, which allows an attacker to enumerate files on the target. The attacker must be authenticated with at least "WebCfg - Services: Snort package" permissions. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-34173? +

CVE-2025-34173 has a CVSS v3.1 score of 4.3 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-2025-34173? +

CVE-2025-34173 affects products from pfsense, specifically: pfsense. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-34173? +

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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