Vulnerabilities

TerraMaster NAS through 4.2.30 allows remote WAN attackers to execute arbitrary code as root via the raidtype and diskstring parameters for PHP Object Instantiation to the api.php?mobile/createRaid URI. (Shell metacharacters can be placed in raidtype because popen is used without any sanitization.) The credentials from CVE-2022-24990 exploitation can be used.

TerraMaster TOS (TerraMaster OS) versions 4.2.29 and earlier do not require authentication (CWE-306) on the mobile API endpoint module/api.php?mobile/webNasIPS, and a request presenting the User-Agent "TNAS" returns system information that includes the administrative account's password in the PWD field. An unauthenticated attacker with network access to the NAS web interface can send this request and read the response, obtaining full administrative credentials. With those credentials an attacker controls the NAS, and public proof-of-concept exploits chain this flaw with a PHP object-instantiation bug to achieve unauthenticated remote command execution. Any TerraMaster NAS running TOS 4.2.29 or earlier is affected, with internet-exposed devices at the greatest risk. Exploitation is confirmed: the flaw is in CISA's Known Exploited Vulnerabilities Catalog (added 2023-02-10) with known ransomware use, carries an EPSS of roughly 84%, and CISA and press reports describe active attacks, including North Korean ransomware activity against healthcare and critical infrastructure.

Do: Upgrade TerraMaster TOS to a release newer than 4.2.29 per the vendor's instructions, as required by the CISA KEV entry. If patching must wait, restrict the TOS web interface to trusted networks so unauthenticated users cannot reach module/api.php?mobile/webNasIPS. Check device logs for requests to the webNasIPS endpoint with a TNAS User-Agent and look for signs of post-compromise activity, since ransomware use of this flaw is known.

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 a specifically crafted input to /tos/index.php?app/del.

TerraMaster F2-210 devices through 2021-04-03 use UPnP to make the admin web server accessible over the Internet on TCP port 8181, which is arguably inconsistent with the "It is only available on the local network" documentation. NOTE: manually editing /etc/upnp.json provides a partial but undocumented workaround.

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.

Remote Command Execution (RCE) vulnerability in TerraMaster TOS <= 4.2.06 allow remote unauthenticated attackers to inject OS commands via /include/makecvs.php in Event parameter.

An unauthenticated command-execution vulnerability exists in TerraMaster TOS through 4.2.06 via shell metacharacters in the Event parameter in include/makecvs.php during CSV creation.

An issue was discovered on TerraMaster FS-210 4.0.19 devices. Normal users can use 1.user.php for privilege elevation.

An issue was discovered on TerraMaster FS-210 4.0.19 devices. An unauthenticated attacker can download log files via the include/makecvs.php?Event= substring.

System command injection in logtable.php in TerraMaster TOS version 3.1.03 allows attackers to execute system commands via the "Event" parameter.

Shell metacharacter injection vulnerability in /usr/www/include/ajax/GetTest.php in TerraMaster TOS before 3.0.34 leads to remote code execution as root.