PT-2019-8608 · Amcrest · Amcrest Ipm-721S

Ethanhunnt + 1 · Published 2019-07-03 · Updated 2019-07-11 · CVE-2017-8226

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Amcrest IPM-721S version V2.420.AC00.16.R.20160909

Description The Amcrest IPM-721S device has default credentials that are hardcoded in the firmware. These credentials can be extracted by reversing the firmware. The binary "sonia" contains the vulnerable function that sets up the default credentials on the device. The function sub 3DB2FC sets up the values at address 0x003DB5A6, and the function sub 5C057C then sets this value and adds it to the Configuration files in /mnt/mtd/Config/Account1 file.

Recommendations For Amcrest IPM-721S version V2.420.AC00.16.R.20160909, consider changing the default credentials to prevent unauthorized access. As a temporary workaround, restrict access to the binary "sonia" to minimize the risk of exploitation. Avoid using the default credentials in the Configuration files until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Using Hardcoded Credentials

Weakness Enumeration

CWE-798

Related Identifiers

CVE-2017-8226

Affected Products

Amcrest Ipm-721S

References · 6

• 🔥 https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Amcrest_sec_issues.pdf · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2017-8226 · Security Note
• https://osv.dev/vulnerability/CVE-2017-8226 · Vendor Advisory
• https://seclists.org/bugtraq/2019/Jun/8 · Note
• https://t.me/cibsecurity/5353 · Telegram Post
• http://packetstormsecurity.com/files/153224/Amcrest-IPM-721S-Credential-Disclosure-Privilege-Escalation.html · Note