CVE-2017-8226
First published: Wed Jul 03 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Amcrest Ipm-721s Firmware | <=2.420.ac00.16.r.20160909 | |
| Amcrest IPM-721S |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2017-8226?
The severity of CVE-2017-8226 is critical with a CVSS score of 9.8.
Which Amcrest devices are affected by CVE-2017-8226?
Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices are affected by CVE-2017-8226.
What is the vulnerability description of CVE-2017-8226?
CVE-2017-8226 is a vulnerability in Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices that have default credentials hardcoded in the firmware, which can be extracted by reversing the firmware.
How can the default credentials be obtained in Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices?
The default credentials in Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices can be obtained by reversing the firmware using a tool like binwalk.
Are all versions of Amcrest IPM-721S affected by CVE-2017-8226?
No, only the devices running firmware version V2.420.AC00.16.R 9/9/2016 are affected by CVE-2017-8226.
- collector/nvd-index
- agent/references
- agent/weakness
- agent/severity
- agent/author
- agent/tags
- agent/type
- agent/event
- agent/description
- vendor/amcrest
- canonical/amcrest ipm-721s firmware
- version/amcrest ipm-721s firmware/2.420.ac00.16.r.20160909
- canonical/amcrest ipm-721s