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Vulnerability record · CVE-2017-8415 · published 2 July 2019

CVE-2017-8415: Dlink dcs-1130 firmware hard-coded credentials vulnerability

Dlink · Dcs 1130 Firmware

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.

9.8 CVSS 3.1 Critical EPSS 3.9% · top 10.0% CWE-798 · Hard-coded credentials
9.8CVSS 3.1 base score, v2 10.0
3.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/153226/Dlink-DCS-1130-Command-Injection-CSRF-Stack-Overflow.html Third Party AdvisoryVDB Entry
https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Dlink_DCS_1130_security.pdf Not ApplicableThird Party Advisory
https://seclists.org/bugtraq/2019/Jun/8 Mailing ListThird Party Advisory
http://packetstormsecurity.com/files/153226/Dlink-DCS-1130-Command-Injection-CSRF-Stack-Overflow.html Third Party AdvisoryVDB Entry
https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Dlink_DCS_1130_security.pdf Not ApplicableThird Party Advisory
https://seclists.org/bugtraq/2019/Jun/8 Mailing ListThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2013-1599Dlink dcs-3411 firmware os command injection vulnerabilityA Command Injection vulnerability exists in the /var/www/cgi-bin/rtpd.cgi script in D-Link IP Cameras DCS-3411/3430 firmware 1.02, DCS-5605/5635 1.01…EPSS 40%9.8CVE-2017-8410Dlink dcs-1100 firmware memory buffer overflow vulnerabilityAn issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The binary rtspd in /sbin folder of the device handles all the rtsp connections rece…EPSS 5.6%9.8CVE-2017-8404Dlink dcs-1130 firmware command injection vulnerabilityAn issue was discovered on D-Link DCS-1130 devices. The device provides a user with the capability of setting a SMB folder for the video clippings re…EPSS 7.7%9.8CVE-2017-8408Dlink dcs-1130 firmware command injection vulnerabilityAn issue was discovered on D-Link DCS-1130 devices. The device provides a user with the capability of setting a SMB folder for the video clippings re…EPSS 5.1%8.8CVE-2017-8412Dlink dcs-1130 firmware memory buffer overflow vulnerabilityAn issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device has a custom binary called mp4ts under the /var/www/video folder. It seem…EPSS 5.7%8.8CVE-2017-8413Dlink dcs-1130 firmware command injection vulnerabilityAn issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device runs a custom daemon on UDP port 5978 which is called "dldps2121" and lis…EPSS 10%8.8CVE-2017-8416Dlink dcs-1130 firmware memory buffer overflow vulnerabilityAn issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device runs a custom daemon on UDP port 5978 which is called "dldps2121" and lis…EPSS 12%8.8CVE-2017-8417Dlink dcs-1100 firmware vulnerabilityAn issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device requires that a user logging into the device provide a username and passw…EPSS 3.8%

Source: NIST National Vulnerability Database (record CVE-2017-8415), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.