VULHUB ™

### Summary An exploitable null pointer dereference exists in the Web Application functionality of Moxa AWK-3131A Wireless Access Point running firmware 1.1. Any HTTP GET request not preceded by an '/' will cause a segmentation fault in the web server. An attacker can send any of a multitude of potentially unexpected HTTP get requests to trigger this vulnerability. ### Tested Versions Moxa AWK-3131A Series Industrial IEEE 802.11a/b/g/n wireless AP/bridge/client 1.1 ### Product URLs http://www.moxa.com/product/AWK-3131A.htm ### CVSSv3 Score 7.5 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H ### Details An exploitable null pointer dereference exists in the Web Application functionality of Moxa AWK-3131A Series Industrial IEEE 802.11a/b/g/n wireless AP/bridge/client. Any HTTP GET request not preceded by an '/' will cause a segmentation fault in the web server. An attacker can send any of a multitude of potentially unexpected HTTP GET requests to trigger this vulnerability. There is no...

### Summary An exploitable null pointer dereference exists in the Web Application functionality of Moxa AWK-3131A Wireless Access Point running firmware 1.1. Any HTTP GET request not preceded by an '/' will cause a segmentation fault in the web server. An attacker can send any of a multitude of potentially unexpected HTTP get requests to trigger this vulnerability. ### Tested Versions Moxa AWK-3131A Series Industrial IEEE 802.11a/b/g/n wireless AP/bridge/client 1.1 ### Product URLs http://www.moxa.com/product/AWK-3131A.htm ### CVSSv3 Score 7.5 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H ### Details An exploitable null pointer dereference exists in the Web Application functionality of Moxa AWK-3131A Series Industrial IEEE 802.11a/b/g/n wireless AP/bridge/client. Any HTTP GET request not preceded by an '/' will cause a segmentation fault in the web server. An attacker can send any of a multitude of potentially unexpected HTTP GET requests to trigger this vulnerability. There is no way to restart the web application using legitimate functionality outside of rebooting the device. ### Exploit Proof-of-Concept The following is one of many HTTP GET requests which will result in a web server segmentation fault: ``` GET a HTTP/1.1 ``` ### Mitigation To significantly mitigate risk of exploitation, disable the web application before the device is deployed. ### Timeline * 2016-11-18 - Vendor Disclosure * 2017-04-10 - Public Release ### CREDIT * Discovered by Patrick DeSantis of Cisco Talos.