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
High
AC
The successful attack depends on the evasion or circumvention of security-enhancing techniques in place that would otherwise hinder the attack. These include: Evasion of exploit mitigation techniques. The attacker must have additional methods available to bypass security measures in place. For example, circumvention of address space randomization (ASLR) or data execution prevention must be performed for the attack to be successful. Obtaining target-specific secrets. The attacker must gather some target-specific secret before the attack can be successful. A secret is any piece of information that cannot be obtained through any amount of reconnaissance. To obtain the secret the attacker must perform additional attacks or break otherwise secure measures (e.g. knowledge of a secret key may be needed to break a crypto channel). This operation must be performed for each attacked target.
Privileges Required
Low
PR
The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
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: WinGate v9.4.1.5998 / Insecure Permissions EoP
[+] Credits: John Page (aka hyp3rlinx)
[+] Website: hyp3rlinx.altervista.org
[+] Source: http://hyp3rlinx.altervista.org/advisories/WINGATE-INSECURE-PERMISSIONS-LOCAL-PRIVILEGE-ESCALATION.txt
[+] twitter.com/hyp3rlinx
[+] ISR: ApparitionSec
[Vendor]
wingate.com
[Product]
WinGate v9.4.1.5998
WinGate is a sophisticated integrated Internet gateway and communications server designed to meet the control,
security and email needs of today's Internet-connected businesses.
[Vulnerability Type]
Insecure Permissions EoP
[CVE Reference]
CVE-2020-13866
[Security Issue]
WinGate has insecure permissions for the installation directory, which allows local
users ability to gain privileges by replacing an executable file with a Trojan horse.
The WinGate directory hands (F) full control to authenticated users, who can then run
arbitrary code as SYSTEM after a WinGate restart or system reboot.
C:\Program Files\WinGate>cacls WinGate.exe
C:\Program Files\WinGate\WinGate.exe NT AUTHORITY\Authenticated Users:(ID)F
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Administrators:(ID)F
BUILTIN\Users:(ID)R
APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(ID)R
APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(ID)R
[Affected Component]
WinGate Installation Directory
[Impact Code execution]
true
[Impact Denial of Service]
true
[Impact Escalation of Privileges]
true
[Impact Information Disclosure]
true
[Exploit/POC]
Logon as standard user replace WinGate.exe with a trojan executable, wait for restart or reboot the system, your code runs as SYSTEM.
[Network Access]
Local
[Severity]
High
[Disclosure Timeline]
Vendor Notification: May 10, 2020
Vendor acknowledgement: May 10, 2020
Vulnerability confirmed: May 18, 2020
Request status: May 22, 2020
No reply
Notify vendor request CVE: May 26, 2020
No reply
Advised of public disclosure: June 1, 2020
No reply
June 4, 2020 : 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).
hyp3rlinx
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