Description

Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have a timeout policy to wait for 5 minutes in case 30 incorrect password attempts are detected using the Web and HTTP API interface provided by the device. However, if the same brute force attempt is performed using the ONVIF specification (which is supported by the same binary) then there is no account lockout or timeout executed. This can allow an attacker to circumvent the account protection mechanism and brute force the credentials. If the firmware version V2.420.AC00.16.R 9/9/2016 is dissected using binwalk tool, one obtains a _user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that many of the binaries in the /usr folder. The binary "sonia" is the one that has the vulnerable function that performs the credential check in the binary for the ONVIF specification. If one opens this binary in IDA-pro one will notice that this follows a ARM little endian format. The function at address 00671618 in IDA pro is parses the WSSE security token header. The sub_ 603D8 then performs the authentication check and if it is incorrect passes to the function sub_59F4C which prints the value "Sender not authorized."

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  9.8 CRITICAL

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

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score:  5.0 MEDIUM

Vector:  (AV:N/AC:L/Au:N/C:P/I:N/A:N)

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-254	7PK - Security Features	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

CVE Modified by MITRE 5/14/2024 12:46:48 AM

Action	Type	Old Value	New Value

Initial Analysis by NIST 7/10/2019 9:58:40 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:L/Au:N/C:P/I:N/A:N)
Added	CVSS V3		AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added	CWE		CWE-254
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