Command Injection in OpenWrt - CVE-2021-28961
Published: August 5, 2021
Vulnerability identifier: #VU55591
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-28961
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary commands on the target system.
The vulnerability exists due to improper input validation in the applications/luci-app-ddns/luasrc/model/cbi/ddns/detail.lua in the DDNS package. A remote authenticated attacker can pass specially crafted data to the application and execute arbitrary commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
OpenWrt
How to mitigate CVE-2021-28961
Install updates from vendor's website.
OpenWrt - update to 19.07.8