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CVE-2017-8415

Status Candidate

Overview

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.

Related Files

Dlink DCS-1130 Command Injection / CSRF / Stack Overflow
Posted Jun 7, 2019
Authored by Mandar Satam

Dlink DCS-1130 suffers from command injection, cross site request forgery, stack overflow, and various other vulnerabilities.

tags | exploit, overflow, vulnerability, csrf
advisories | CVE-2017-8404, CVE-2017-8405, CVE-2017-8406, CVE-2017-8407, CVE-2017-8408, CVE-2017-8409, CVE-2017-8410, CVE-2017-8411, CVE-2017-8412, CVE-2017-8413, CVE-2017-8414, CVE-2017-8415, CVE-2017-8416, CVE-2017-8417
MD5 | 2740a7ddd36c75b0b15552c41ce5fa00
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