CVE-2017-8226 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 firmwar...
- Published
- Updated
- Exploit status
- No public exploit known
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| amcrest ipm-721s firmware | <= 2.420.ac00.16.r.20160909 | No fix listed |
References
- packetstormsecurity.com third-party-advisory vdb-entry
- github.com exploit third-party-advisory
- 20190609 Newly releases IoT security issues mailing-list third-party-advisory