CVE-2017-1000479

EPSS 32.8%

Vexday Risk Score

30Low

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Functional exploit

Automatable exploit available (Nuclei/Metasploit).

CVSS —EPSS 32.8%KEV nãoPoC —Nuclei —Metasploit simPatch —

Lifecycle

21 Nov 2017Metasploit module available

03 Jan 2018Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

pfSense versions 2.4.1 and lower are vulnerable to clickjacking attacks in the CSRF error page resulting in privileged execution of arbitrary code, because the error detection occurs before an X-Frame-Options header is set. This is fixed in 2.4.2-RELEASE. OPNsense, a 2015 fork of pfSense, was not vulnerable since version 16.1.16 released on June 06, 2016. The unprotected web form was removed from the code during an internal security audit under "possibly insecure" suspicions.

Affected products

n/a · n/a

References

https://doc.pfsense.org/index.php/2.4.2_New_Features_and_Changes https://github.com/opnsense/core/commit/d218b225 https://github.com/pfsense/pfsense/commit/386d89b07 https://www.netgate.com/blog/pfsense-2-4-2-release-p1-and-2-3-5-release-p1-now-available.html https://www.securify.nl/en/advisory/SFY20171101/clickjacking-vulnerability-in-csrf-error-page-pfsense.html http://www.openwall.com/lists/oss-security/2017/11/22/7