CVE-2021-27221 — HIGH (8.1)

Vulnerability Description

MikroTik RouterOS 6.47.9 allows remote authenticated ftp users to create or overwrite arbitrary .rsc files via the /export command. NOTE: the vendor's position is that this is intended behavior because of how user policies work

CVSS Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Mikrotik	Routeros	6.47.9

References

https://onovy.medium.com/routeros-user-with-just-ftp-policy-can-write-to-filesysExploitThird Party Advisory
https://onovy.medium.com/routeros-user-with-just-ftp-policy-can-write-to-filesysExploitThird Party Advisory

FAQ

What is CVE-2021-27221?

CVE-2021-27221 is a vulnerability with a CVSS score of 8.1 (HIGH). MikroTik RouterOS 6.47.9 allows remote authenticated ftp users to create or overwrite arbitrary .rsc files via the /export command. NOTE: the vendor's position is that this is intended behavior becaus...

How severe is CVE-2021-27221?

CVE-2021-27221 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-27221?

Check the references section above for vendor advisories and patch information. Affected products include: Mikrotik Routeros.