CVE-2017-1000479

high-risk
Published 2018-01-03

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.

Do I need to act?

!
19.0% chance of exploitation in next 30 days
EPSS score — higher than 81% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Netgate Opnsense Project

References (12)

Exploit http://www.openwall.com/lists/oss-security/2017/11/22/7
Issue Tracking https://doc.pfsense.org/index.php/2.4.2_New_Features_and_Changes
Patch https://github.com/opnsense/core/commit/d218b225
Patch https://github.com/pfsense/pfsense/commit/386d89b07
Third Party Advisory https://www.netgate.com/blog/pfsense-2-4-2-release-p1-and-2-3-5-release-p1-now-a...
Exploit https://www.securify.nl/en/advisory/SFY20171101/clickjacking-vulnerability-in-cs...
Exploit http://www.openwall.com/lists/oss-security/2017/11/22/7
Issue Tracking https://doc.pfsense.org/index.php/2.4.2_New_Features_and_Changes
Patch https://github.com/opnsense/core/commit/d218b225
Patch https://github.com/pfsense/pfsense/commit/386d89b07
Third Party Advisory https://www.netgate.com/blog/pfsense-2-4-2-release-p1-and-2-3-5-release-p1-now-a...
Exploit https://www.securify.nl/en/advisory/SFY20171101/clickjacking-vulnerability-in-cs...
50
/ 100
high-risk
Severity 30/34 · Critical
Exploitability 13/34 · Low
Exposure 7/34 · Low