D-Link DIR-823G Firmware 1.0.2b05_20181207

D-Link DIR-823G DDNS Service HNAP1 SetDDNSSettings improper authorization

D-Link DIR-823G UPnP Service HNAP1 SetUpnpSettings improper authorization

D-Link DIR-823G Web Management Interface HNAP1 SetVirtualServerSettings access control

D-link DIR-823G Web boa.conf least privilege violation

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.

A command injection vulnerability exists in the D-Link DIR-823G router firmware DIR823G_V1.0.2B05_20181207.bin in the timelycheck and sysconf binaries, which process the /tmp/new_qos.rule configuration file. The vulnerability occurs because parsed fields from the configuration file are concatenated into command strings and executed via system() without any sanitization. An attacker with write access to /tmp/new_qos.rule can execute arbitrary commands on the device.

A command injection vulnerability exists in the D-Link DIR-823G router firmware DIR823G_V1.0.2B05_20181207.bin in the timelycheck and sysconf binaries, which process the /var/system/linux_vlan_reinit file. The vulnerability occurs because content read from this file is only partially validated for a prefix and then formatted using vsnprintf() before being executed with system(), allowing an attacker with write access to /var/system/linux_vlan_reinit to execute arbitrary commands on the device.