OS Command Injection in Movable Type

1) OS Command Injection

EUVDB-ID: #VU66754

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-38078

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in the Movable Type XMLRPC API. A remote unauthenticated attacker can send a specially crafted message and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Movable Type: - - 6.8.6

Movable Type Premium: - - 1.52

Movable Type Advanced: - - 6.8.6

Movable Type Premium Advanced: - - 1.52

CPE2.3

• cpe:2.3:a:six_apart:movable_type:*:*:*:*:*:*:*:*
• cpe:2.3:a:six_apart:movable_type:r.5202:*:*:*:*:*:*:*
• cpe:2.3:a:six_apart:movable_type:6.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:six_apart:movable_type_premium:*:*:*:*:*:*:*:*
• cpe:2.3:a:six_apart:movable_type_premium:1.52:*:*:*:*:*:*:*
• cpe:2.3:a:six_apart:movable_type_advanced:*:*:*:*:*:*:*:*
• cpe:2.3:a:six_apart:movable_type_advanced:r.5202:*:*:*:*:*:*:*
• cpe:2.3:a:six_apart:movable_type_advanced:6.8.1:*:*:*:*:*:*:*
• cpe:2.3:a:six_apart:movable_type_premium_advanced:*:*:*:*:*:*:*:*
• cpe:2.3:a:six_apart:movable_type_premium_advanced:1.52:*:*:*:*:*:*:*

External links

https://movabletype.org/news/2022/08/mt-795-687-released.html
https://jvn.jp/en/jp/JVN57728859/index.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.