VDB-74780 · CVE-2015-2295 · ID 131022

pfSense up to 2.2.0 WebGUI system_firmware_restorefullbackup.php deletefile cross-site request forgery

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in pfSense up to 2.2.0. It has been declared as problematic. This affects an unknown part of the file system_firmware_restorefullbackup.php of the component WebGUI. Such manipulation of the argument deletefile leads to cross-site request forgery. This vulnerability is referenced as CVE-2015-2295. It is possible to launch the attack remotely. Furthermore, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in pfSense up to 2.2.0 (Firewall Software). It has been rated as critical. Affected by this issue is some unknown processing of the file system_firmware_restorefullbackup.php of the component WebGUI. The manipulation of the argument deletefile with an unknown input leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Cross-site request forgery (CSRF) vulnerability in system_firmware_restorefullbackup.php in the WebGUI in pfSense before 2.2.1 allows remote attackers to hijack the authentication of administrators for requests that delete arbitrary files via the deletefile parameter.

The weakness was published 04/10/2015 (Website). The advisory is shared for download at pfsense.org. This vulnerability is handled as CVE-2015-2295 since 03/14/2015. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details as well as a public exploit are known.

A public exploit has been developed by High-Tech Bridge SA and been published even before and not after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:system_firmware_restorefullbackup.php it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 106493 (pfSense < 2.2.1 Multiple Vulnerabilities (SA-15_02 - SA-15_04)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 34070 (pfSense Multiple Vulnerabilities (pfSense-SA-15_04,pfSense-SA-15_03)).

Upgrading to version 2.2.1 eliminates this vulnerability. A possible mitigation has been published 2 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (36506), Tenable (106493) and SecurityFocus (BID 73344†). Similar entry is available at VDB-74588. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Firewall Software

Name

pfSense

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.1
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross-site request forgery
CWE: CWE-352 / CWE-862 / CWE-863
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: High-Tech Bridge SA
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 106493
Nessus Name: pfSense < 2.2.1 Multiple Vulnerabilities (SA-15_02 - SA-15_04)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800967
OpenVAS Name: pfSense Cross Site Scripting and Cross Site Request Forgery Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: pfSense 2.2.1

Timelineinfo

03/14/2015 🔍
03/26/2015 +12 days 🔍
03/26/2015 +0 days 🔍
04/10/2015 +15 days 🔍
04/10/2015 +0 days 🔍
04/11/2015 +1 days 🔍
03/25/2016 +349 days 🔍
01/31/2018 +677 days 🔍
01/27/2025 +2552 days 🔍