cve/2019/CVE-2019-3977.md

### [CVE-2019-3977](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3977)
![](https://img.shields.io/static/v1?label=Product&message=MikroTik%20RouterOS&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-494%20Insufficient%20checks%20on%20origin&color=brighgreen)

### Description

RouterOS 6.45.6 Stable, RouterOS 6.44.5 Long-term, and below insufficiently validate where upgrade packages are download from when using the autoupgrade feature. Therefore, a remote attacker can trick the router into "upgrading" to an older version of RouterOS and possibly reseting all the system's usernames and passwords.

### POC

#### Reference
- https://www.tenable.com/security/research/tra-2019-46

#### Github
No PoCs found on GitHub currently.