Multiple DrayTek Vigor Routers are vulnerable to a buffer overflow, caused by improper bounds checking by the /cgi-bin/wlogin.cgi script. By sending specially-crafted username and/or password as base64 encoded strings inside the fields aa and ab of the login page, a remote attacker could overflow a buffer and execute arbitrary code or cause a denial of service condition on the device.
CVSS 3.0 Information
Privileges Required: None
User Interaction: None
Access Vector: Network
Access Complexity: Low
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Remediation Level: Official Fix
Upgrade to the latest version of DrayTek Vigor Routers, available from the DrayTek Web site. See References.
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