A denial-of-service issue was discovered on certain GL-iNet devices. Some websites can detect devices exposed to the external network through DDNS, and consequently obtain the IP addresses and ports of devices that are exposed. By using special usernames and special characters (such as half parentheses or square brackets), one can call the login interface and cause the session-management program to crash, resulting in customers being unable to log into their devices. This affects MT6000 4.5.6, XE3000 4.4.5, X3000 4.4.6, MT3000 4.5.0, MT2500 4.5.0, AXT1800 4.5.0, AX1800 4.5.0, A1300 4.5.0, S200 4.1.4-0300, X750 4.3.7, SFT1200 4.3.7, MT1300 4.3.10, AR750 4.3.10, AR750S 4.3.10, AR300M 4.3.10, AR300M16 4.3.10, B1300 4.3.10, MT300N-V2 4.3.10, and XE300 4.3.16.

GL.iNET MT3000 4.1.0 Release 2 is vulnerable to OS Command Injection via /usr/lib/oui-httpd/rpc/logread.

An issue was discovered on GL.iNet devices before 3.216. An API endpoint reveals information about the Wi-Fi configuration, including the SSID and key.

An issue was discovered on GL.iNet devices running firmware before 3.216. There is an arbitrary file write in which an empty file can be created almost anywhere on the filesystem, as long as the filename and path is no more than 6 characters (the working directory is /www).

An issue was discovered on GL.iNet devices before 3.216. Through the software installation feature, it is possible to inject arbitrary parameters in a request to cause opkg to obtain a list of files in a specific directory, by using the regex feature in a package name.

An issue was discovered on GL.iNet devices before 3.216. There is an arbitrary file write in which an empty file can be created anywhere on the filesystem. This is caused by a command injection vulnerability with a filter applied.

An issue was discovered on GL.iNet devices before 3.216. Through the software installation feature, it is possible to install arbitrary software, such as a reverse shell, because the restrictions on the available package list are limited to client-side verification. It is possible to install software from the filesystem, the package list, or a URL.

A path traversal issue was discovered on GL.iNet devices before 3.216. Through the file sharing feature, it is possible to share an arbitrary directory, such as /tmp or /etc, because there is no server-side restriction to limit sharing to the USB path.

An issue was discovered on GL.iNet devices before 3.216. The function guci2_get() found in libglutil.so has a buffer overflow when an item is requested from a UCI context, and the value is pasted into a char pointer to a buffer without checking the size of the buffer.

An issue was discovered on GL.iNet devices before 3.216. There is an arbitrary file write in which an empty file can be created anywhere on the filesystem. This is caused by a command injection vulnerability with a filter applied. Through the software installation feature, it is possible to inject arbitrary parameters in a request to cause opkg to read an arbitrary file name while using root privileges. The -f option can be used with a configuration file.

GL.iNET GL-AR750S-Ext firmware v3.215 uses an insecure protocol in its communications which allows attackers to eavesdrop via a man-in-the-middle attack.

GL.iNET GL-AR750S-Ext firmware v3.215 inserts the admin authentication token into a GET request when the OpenVPN Server config file is downloaded. The token is then left in the browser history or access logs, potentially allowing attackers to bypass authentication via session replay.

A vulnerability in GL.iNET GL-E750 Mudi before firmware v3.216 allows authenticated attackers to execute arbitrary code via a crafted POST request.

An issue in GL-iNet products AR750/AR750S/AR300M/AR300M16/MT300N-V2/B1300/MT1300/SFT1200/X750 v4.3.11, MT3000/MT2500/AXT1800/AX1800/A1300/X300B v4.5.16, XE300 v4.3.16, E750 v4.3.12, AP1300/S1300 v4.3.13, XE3000/X3000 v4, and B2200/MV1000/MV1000W/USB150/N300/SF1200 v3.216 allows attackers to intercept communications via a man-in-the-middle attack when DDNS clients are reporting data to the server.

Shell Injection vulnerability GL.iNet A1300 v4.4.6, AX1800 v4.4.6, AXT1800 v4.4.6, MT3000 v4.4.6, MT2500 v4.4.6, MT6000 v4.5.0, MT1300 v4.3.7, MT300N-V2 v4.3.7, AR750S v4.3.7, AR750 v4.3.7, AR300M v4.3.7, and B1300 v4.3.7., allows local attackers to execute arbitrary code via the get_system_log and get_crash_log functions of the logread module, as well as the upgrade_online function of the upgrade module.

Insecure Permissions vulnerability in GL.iNet AX1800 version 4.0.0 before 4.5.0 allows a remote attacker to execute arbitrary code via the upload API function.

Insecure Permissions vulnerability in GL.iNet AX1800 version 4.0.0 before 4.5.0 allows a remote attacker to execute arbitrary code via a crafted script to the gl_nas_sys authentication function.

Insecure Permissions vulnerability in GL.iNet AX1800 v.3.215 and before allows a remote attacker to execute arbitrary code via the file sharing function.

In GL.iNET GL-AR300M routers with firmware 3.216 it is possible to inject arbitrary shell commands through the OpenVPN client file upload functionality.

In GL.iNET GL-AR300M routers with firmware v4.3.7 it is possible to write arbitrary files through a path traversal attack in the OpenVPN client file upload functionality.