Description

Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices mishandle reboots within the past two hours. Amcrest cloud services does not perform a thorough verification when allowing the user to add a new camera to the user's account to ensure that the user actually owns the camera other than knowing the serial number of the camera. This can allow an attacker who knows the serial number to easily add another user's camera to an attacker's cloud account and control it completely. This is possible in case of any camera that is currently not a part of an Amcrest cloud account or has been removed from the user's cloud account. Also, another requirement for a successful attack is that the user should have rebooted the camera in the last two hours. However, both of these conditions are very likely for new cameras that are sold over the Internet at many ecommerce websites or vendors that sell the Amcrest products. The successful attack results in an attacker being able to completely control the camera which includes being able to view and listen on what the camera can see, being able to change the motion detection settings and also be able to turn the camera off without the user being aware of it. Note: The same attack can be executed using the Amcrest Cloud mobile application.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  8.8 HIGH

Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score:  6.8 MEDIUM

Vector:  (AV:N/AC:M/Au:N/C:P/I:P/A:P)

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://packetstormsecurity.com/files/153224/Amcrest-IPM-721S-Credential-Disclosure-Privilege-Escalation.html	Third Party Advisory  VDB Entry
https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Amcrest_sec_issues.pdf	Exploit  Third Party Advisory
https://seclists.org/bugtraq/2019/Jun/8	Mailing List  Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-264	Permissions, Privileges, and Access Controls	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Initial Analysis by NIST 7/10/2019 10:28:04 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		AND OR *cpe:2.3:o:amcrest:ipm-721s_firmware:*:*:*:*:*:*:*:* versions up to (including) 2.420.ac00.16.r.20160909 OR cpe:2.3:h:amcrest:ipm-721s:-:*:*:*:*:*:*:*
Added	CVSS V2		(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Added	CVSS V2 Metadata		Victim must voluntarily interact with attack mechanism
Added	CVSS V3		AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Added	CWE		CWE-264
Changed	Reference Type	http://packetstormsecurity.com/files/153224/Amcrest-IPM-721S-Credential-Disclosure-Privilege-Escalation.html No Types Assigned	http://packetstormsecurity.com/files/153224/Amcrest-IPM-721S-Credential-Disclosure-Privilege-Escalation.html Third Party Advisory, VDB Entry
Changed	Reference Type	https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Amcrest_sec_issues.pdf No Types Assigned	https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Amcrest_sec_issues.pdf Exploit, Third Party Advisory
Changed	Reference Type	https://seclists.org/bugtraq/2019/Jun/8 No Types Assigned	https://seclists.org/bugtraq/2019/Jun/8 Mailing List, Third Party Advisory