CVE-2021-45840 — CRITICAL (9.8)

Vulnerability Description

It is possible to execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by sending specifically crafted input to /tos/index.php?app/app_start_stop.

CVSS Score

9.8

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Terra-Master	Tos	4.2.15-2107141517
Terra-Master	F2-210	-
Terra-Master	F4-210	-

References

https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/ExploitThird Party Advisory
https://thatsn0tmy.site/posts/2021/12/how-to-summon-rces/ExploitThird Party Advisory

FAQ

What is CVE-2021-45840?

CVE-2021-45840 is a vulnerability with a CVSS score of 9.8 (CRITICAL). It is possible to execute arbitrary commands as root in Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) by sending specifically crafted input to /tos/index.php?app/app_start_stop.

How severe is CVE-2021-45840?

CVE-2021-45840 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-45840?

Check the references section above for vendor advisories and patch information. Affected products include: Terra-Master Tos, Terra-Master F2-210, Terra-Master F4-210.