An issue was discovered in /bin/goahead on D-Link DIR-823G devices with firmware 1.02B03. There is incorrect access control allowing remote attackers to get sensitive information (such as MAC address) about all clients in the WLAN via the GetClientInfo HNAP API. Consequently, an attacker can achieve information disclosure without authentication.

An issue was discovered on D-Link DIR-823G devices with firmware through 1.02B03. A command Injection vulnerability allows attackers to execute arbitrary OS commands via a crafted /HNAP1 request. This occurs when any HNAP API function triggers a call to the system function with untrusted input from the request body, such as a body of ' /bin/telnetd' for the GetDeviceSettingsset API function. Consequently, an attacker can execute any command remotely when they control this input.

An issue was discovered on D-Link DIR-823G devices with firmware through 1.02B03. A command Injection vulnerability allows attackers to execute arbitrary OS commands via shell metacharacters in a crafted /HNAP1 request. This occurs when the GetNetworkTomographyResult function calls the system function with an untrusted input parameter named Address. Consequently, an attacker can execute any command remotely when they control this input.

D-Link DIR-859 routers before v1.07b03_beta allow Unauthenticated Information Disclosure via the AUTHORIZED_GROUP=1%0a value, as demonstrated by vpnconfig.php.

Certain D-Link devices have a hardcoded Alphanetworks user account with TELNET access because of /etc/config/image_sign or /etc/alpha_config/image_sign. This affects DIR-600 B1 V2.01 for WW, DIR-890L A1 v1.03, DIR-615 J1 v100 (for DCN), DIR-645 A1 v1.03, DIR-815 A1 v1.01, DIR-823 A1 v1.01, and DIR-842 C1 v3.00.

An issue was discovered on D-Link DIR-823G devices with firmware V1.0.2B05. There is a command injection in HNAP1 (exploitable with Authentication) via shell metacharacters in the LoginPassword field to Login.

An issue was discovered on D-Link DIR-823G devices with firmware V1.0.2B05. There is a command injection in HNAP1 (exploitable with Authentication) via shell metacharacters in the Username field to Login.

An issue was discovered on D-Link DIR-823G devices with firmware V1.0.2B05. There is a command injection in HNAP1 (exploitable with Authentication) via shell metacharacters in the Interface field to SetStaticRouteSettings.

An issue was discovered on D-Link DIR-823G devices with firmware V1.0.2B05. There is a command injection in HNAP1 (exploitable with Authentication) via shell metacharacters in the MaxIdTime field to SetWanSettings.

An issue was discovered on D-Link DIR-823G devices with firmware V1.0.2B05. There is a command injection in HNAP1 (exploitable with Authentication) via shell metacharacters in the Type field to SetWanSettings, a related issue to CVE-2019-13482.

An issue was discovered on D-Link DIR-823G devices with firmware 1.02B03. There is a command injection in HNAP1 (exploitable with Authentication) via shell metacharacters in the IPAddress or Gateway field to SetStaticRouteSettings.

On D-Link DIR-823G 2018-09-19 devices, the GoAhead configuration allows /HNAP1 SetPasswdSettings commands without authentication to trigger an admin password change.

On D-Link DIR-823G 2018-09-19 devices, the GoAhead configuration allows /HNAP1 RunReboot commands without authentication to trigger a reboot.

On D-Link DIR-823G devices, the GoAhead configuration allows /HNAP1 Command Injection via shell metacharacters in the POST data, because this data is sent directly to the "system" library function.

On D-Link DIR-823G devices, ExportSettings.sh, upload_settings.cgi, GetDownLoadSyslog.sh, and upload_firmware.cgi do not require authentication, which allows remote attackers to execute arbitrary code.

D-Link DIR routers contain a stack-based buffer overflow in the HNAP Login action

Processing malformed SOAP messages when performing the HNAP Login action causes a buffer overflow in the stack in some D-Link DIR routers. The vulnerable XML fields within the SOAP body are: Action, Username, LoginPassword, and Captcha. The following products are affected: DIR-823, DIR-822, DIR-818L(W), DIR-895L, DIR-890L, DIR-885L, DIR-880L, DIR-868L, and DIR-850L.

D-Link DIR-823G v1.0.2B05_20181207 is vulnerable to Information Disclosure. The device allows unauthorized configuration file downloads, and the downloaded configuration files contain plaintext user passwords.