CVE-2017-8227: n/a vulnerability

CVE-2017-8227: Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have a timeout policy to wait for 5 minutes in case 30 i...

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."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 16:27 UTC (UTC+00:00)

Security readout for executives and security teams

This CVE affects Amcrest IPM-721S cameras on the listed 2016 firmware. The normal web interface delays further attempts after repeated bad passwords, but the ONVIF interface reportedly does not. That means an attacker who can reach ONVIF may keep guessing credentials without the same lockout protection. Exposure is most likely for deployed Amcrest IPM-721S cameras running firmware V2.420.AC00.16.R.20160909 with ONVIF reachable from untrusted networks, shared networks, or the internet. Evidence for other products or firmware versions is not provided. Prioritize remediation if these cameras are internet-facing or on networks shared with untrusted users. The business risk is credential compromise of surveillance devices, not automatic takeover from the evidence provided. If cameras are isolated and use strong credentials, urgency is lower but still worth closing. Mitigation focus: Identify affected Amcrest IPM-721S devices and firmware versions.; Restrict ONVIF access to trusted management networks only.; Disable ONVIF where it is not operationally required and supported..

Prepared: Jun 6, 2026, 20:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 3, 2019, 19:33 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

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3Source links

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Source materials

CVE List V5 sourceCVE List V5
20190609 Newly releases IoT security issuesCVE reference · mailing-list, x_refsource_BUGTRAQ
https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Amcrest_sec_issues.pdfCVE reference · x_refsource_MISC

Affected products

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