#VU27526 Deserialization of Untrusted Data


Published: 2020-05-05

Vulnerability identifier: #VU27526

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12471

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MonoX
Web applications / Modules and components for CMS

Vendor: Mono

Description

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

The vulnerability exists due to insecure input validation when processing serialized data in "HTML5Upload.ashx" or "Pages/SocialNetworking/lng/en-US/PhotoGallery.aspx". A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

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

This vulnerability affects the following classes:

  • MonoX.MonoSoftware.MonoX.ModuleGallery.HTML5Upload
  • MonoX.MonoSoftware.MonoX.ModuleGallery.SilverLightUploadModule
  • MonoX.MonoSoftware.MonoX.HTML5Upload
  • MonoX.MonoSoftware.MonoX.SilverLightUploadHandler

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MonoX: All versions


CPE

External links
http://github.com/belong2yourself/vulnerabilities/tree/master/MonoX%20CMS/Remote%20Code%20Execution%20via%20Insecure%20Deserialization


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.


Latest bulletins with this vulnerability