Vulnerability exploitation was spotted by users of DrayTek routers. Attackers used CSRF vulnerability to change DNS settings of multiple routers to address: 184.108.40.206.
Vulnerable component: DrayTek firmware
CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:H/RL:O/RC:C
CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)
The vulnerability allows a remote attacker to perform CSRF attacks.
The vulnerability exists due to insufficient validation of the HTTP request origin in DrayTek Vigor web management interface. A remote attacker can change setting of Vigor router.
Note: this vulnerability has been exploited in the wild in May 2018. The attackers changed DNS servers of victims to address: 220.127.116.11