draytek Vulnerabilities and Affected Products

Several CGI endpoints are vulnerable to buffer overflows, by authenticated users, because of missing bounds checking on parameters passed through POST requests to the strcpy function on DrayTek Vigor310 devices through 4.3.2.6.

DrayTek Vigor3910 devices through 4.3.2.6 have a stack-based overflow when processing query string parameters because GetCGI mishandles extraneous ampersand characters and long key-value pairs.

Buffer Overflow vulnerabilities exist in DrayTek Vigor310 devices through 4.3.2.6 (in the Vigor management UI) because of improper retrieval and handling of the CGI form parameters.

A stack-based Buffer Overflow vulnerability in DrayTek Vigor310 devices through 4.3.2.6 allows a remote attacker to execute arbitrary code via a long query string to the cgi-bin/ipfedr.cgi component.

DrayTek Vigor310 devices through 4.3.2.6 use unencrypted HTTP for authentication requests.

DrayTek Vigor310 devices through 4.3.2.6 allow a remote attacker to change settings or cause a denial of service via .cgi pages because of missing bounds checks on read and write operations.

The CGI endpoints v2x00.cgi and cgiwcg.cgi of DrayTek Vigor3910 devices through 4.3.2.6 are vulnerable to buffer overflows, by authenticated users, because of missing bounds checking on parameters passed through POST requests to the strncpy function.

A Directory Traversal issue was discovered in process_post on Draytek Vigor3910 4.3.2.5 devices. When sending a certain POST request, it calls the function and exports information.