CVE-2017-8415
First published: Tue Jul 02 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Dlink Dcs-1130 Firmware | ||
| Dlink Dcs-1130 | ||
| Dlink Dcs-1100 Firmware | ||
| Dlink Dcs-1100 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2017-8415.
What devices are affected by this vulnerability?
D-Link DCS-1100 and DCS-1130 devices are affected by this vulnerability.
What is the severity of CVE-2017-8415?
The severity of CVE-2017-8415 is critical with a CVSS score of 9.8.
What is the CWE number of this vulnerability?
The CWE number of this vulnerability is CWE-798.
Where can I find more information about this vulnerability?
You can find more information about this vulnerability at the references provided: [link1], [link2], [link3].
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- canonical/dlink dcs-1130
- canonical/dlink dcs-1100 firmware
- canonical/dlink dcs-1100