Description
pfSense Plus before 26.07 and pfSense CE through 2.8.1 contain a stored cross-site scripting vulnerability in the Traffic Graphs top-talkers feature, where PTR records returned by reverse DNS lookups are incorporated without sanitization into AJAX responses and rendered as HTML through a DOM sink in the administrator interface. An attacker who controls a PTR record and generates sufficient traffic to appear as a top talker can execute arbitrary JavaScript in an administrator's browser, gaining access to the authenticated session context and same-origin access to the firewall management interface, enabling account creation and arbitrary OS command execution.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Confidentiality (Vulnerable System)
None
Integrity (Vulnerable System)
None
Availability (Vulnerable System)
None
Confidentiality (Subsequent System)
Low
Integrity (Subsequent System)
Low
Availability (Subsequent System)
None
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected products
- Netgate / pfSense CE0 – 2.8.1
- Netgate / pfSense Plus0 – 26.07
References
- MISChttps://docs.netgate.com/downloads/pfSense-SA-26_21.webgui.asc
- MISChttps://docs.netgate.com/pfsense/en/latest/releases/26-07.html
- MISChttps://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html
- VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-traffic-graphs-ptr-record
Updated 15m ago · 8 sources