CVE-2017-8415
An issue was discovered on D-Link DCS-1100 and DCS-1130 devices.
Published 7 y ago · modified 4 mo ago · JSON
Summary
An issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device has a custom telnet daemon as a part of the busybox and retrieves the password from the shadow file using the function getspnam at address 0x00053894. Then performs a crypt operation on the password retrieved from the user at address 0x000538E0 and performs a strcmp at address 0x00053908 to check if the password is correct or incorrect. However, the /etc/shadow file is a part of CRAM-FS filesystem which means that the user cannot change the password and hence a hardcoded hash in /etc/shadow is used to match the credentials provided by the user. This is a salted hash of the string "admin" and hence it acts as a password to the device which cannot be changed as the whole filesystem is read only.
Exploit prediction (EPSS)
3.93% probability of exploitation in the next 30 days, higher than 90% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
- CWE-798 Use of Hard-coded Credentials
References
- seclists.org /bugtraq/2019/Jun/8 · mailing-list, x_refsource_BUGTRAQ, x_transferred
- packetstormsecurity.com /files/153226/Dlink-DCS-1130-Command-Injection-CSRF-Stack-Overflow.html · x_refsource_MISC, x_transferred
- github.com /ethanhunnt/IoT_vulnerabilities/blob/master/Dlink_DCS_1130_security.pdf · x_refsource_MISC, x_transferred
Sources
- CVE List: CVE-2017-8415
- NVD: CVE-2017-8415
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