Micro Focus Operations Bridge Manager SchedulerFacadeForGui Deserialization Of Untrusted Data Remote Code Execution Vulnerability

October 28th, 2020
ZDI-20-1294 ZDI-CAN-11386

CVE ID

CVE-2020-11853

CVSS Score

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

Affected Vendors

Micro Focus

Affected Products

Operations Bridge Manager

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Micro Focus Operations Bridge Manager. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the SchedulerFacadeForGui endpoint. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of SYSTEM.

Additional Details

Micro Focus has issued an update to correct this vulnerability. More details can be found at:
https://softwaresupport.softwaregrp.com/doc/KM03747658

Disclosure Timeline

  • 2020-06-26 - Vulnerability reported to vendor
  • 2020-10-28 - Coordinated public release of advisory

Credit

Pedro Ribeiro (pedrib@gmail.com | @pedrib1337) from Agile Information Security

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