CVE-2017-8226
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have default credentials that are hardcoded in the firmware and can be extracted by anyone who reverses the firmware to identify them. 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 sets up the default credentials on the device. If one opens this binary in IDA-pro, one will notice that this follows a ARM little endian format. The function sub_3DB2FC in IDA pro is identified to be setting up the values at address 0x003DB5A6. The sub_5C057C then sets this value and adds it to the Configuration files in /mnt/mtd/Config/Account1 file.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.8% — more likely to be exploited than 90% of all CVEs |
| Weakness | CWE-798 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2019-07-03 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| amcrest | ipm-721s |
| amcrest | ipm-721s firmware |
References
- http://packetstormsecurity.com/files/153224/Amcrest-IPM-721S-Credential-Disclosure-Privilege-Escalation.html
- https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Amcrest_sec_issues.pdf
- https://seclists.org/bugtraq/2019/Jun/8
- http://packetstormsecurity.com/files/153224/Amcrest-IPM-721S-Credential-Disclosure-Privilege-Escalation.html
- https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Amcrest_sec_issues.pdf
- https://seclists.org/bugtraq/2019/Jun/8
→ the Explorer · watch your stack · NVD