An issue was discovered on certain DrayTek Vigor routers before July 2022 such as the Vigor3910 before 4.3.1.1. /cgi-bin/wlogin.cgi has a buffer overflow via the username or password to the aa or ab field.
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.
| Link | Tags |
|---|---|
| https://www.securityweek.com/smbs-exposed-attacks-critical-vulnerability-draytek-vigor-routers | third party advisory exploit |
| https://www.trellix.com/en-us/about/newsroom/stories/threat-labs/rce-in-dratyek-routers.html | third party advisory exploit |