CVE-2017-8227

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Summary

CVECVE-2017-8227
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-07-03 20:15:00 UTC
Updated2019-07-11 01:58:00 UTC
DescriptionAmcrest 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."

Risk And Classification

Problem Types: CWE-254

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Amcrest Ipm-721s - All All All
Hardware Amcrest Ipm-721s - All All All
Operating System Amcrest Ipm-721s Firmware All All All All

References

ReferenceSourceLinkTags
Amcrest IPM-721S Credential Disclosure / Privilege Escalation ≈ Packet Storm MISC packetstormsecurity.com Third Party Advisory, VDB Entry
Bugtraq: Newly releases IoT security issues BUGTRAQ seclists.org Mailing List, Third Party Advisory
IoT_vulnerabilities/Amcrest_sec_issues.pdf at master · ethanhunnt/IoT_vulnerabilities · GitHub MISC github.com Exploit, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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