Security Advisory 2021-08-01-3 - luci-app-ddns: Multiple authenticated RCEs (CVE-2021-28961)

DESCRIPTION An authenticated user in LuCI is able to inject shell code in luci-app-ddns. Multiple variables in the luci-app-ddns applications where not validated before they were executed on the system's shell, which could be exploited by adding system shell commands. REQUIREMENTS To exploit this...

CVE-2021-28961: Improper Neutralization of Special Elements used in an OS Command

applications/luci-app-ddns/luasrc/model/cbi/ddns/detail.lua in the DDNS package for OpenWrt 19.07 allows remote authenticated users to inject arbitrary commands via POST requests...