Advisory Details

December 29th, 2020

Qognify Ocularis EventCoordinator ConnectedChannel_GotMessage Deserialization of Untrusted Data Remote Code Execution Vulnerability

ZDI-20-1453
ZDI-CAN-11257

CVE ID CVE-2020-27868
CVSS SCORE 9.8, (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Qognify
AFFECTED PRODUCTS Ocularis
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Qognify Ocularis. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of serialized objects provided to the EventCoordinator 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 Qognify has issued an update to correct this vulnerability. More details can be found at:
https://onssi.ftpstream.com/download/pbkwqEBlNQLBpfywrxvR/onssi/Software/Ocularis%206.0/Special%20Build/Ocularis%20Base.exe
DISCLOSURE TIMELINE
  • 2020-07-14 - Vulnerability reported to vendor
  • 2020-12-29 - Coordinated public release of advisory
CREDIT Joachim Kerschbaumer (@joachimk)
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