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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-18224

Zabbix Windows Agent 5.0.2 x64 openssl privilege escalation

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    Details

    • Type: Defect (Security)
    • Status: Closed
    • Priority: Trivial
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 5.4 (plan)
    • Component/s: None
    • Labels:
    • Team:
      Team D
    • Sprint:
      Sprint 72 (Jan 2021), Sprint 73 (Feb 2021)
    • Story Points:
      0.5

      Description

      Zabbix Windows Agent compiled with openssl try to reach ssl configuration file on folder c:\openssl-64bit

      As this folder is not existing, a local user without privilege is able to create it, and craft a malicious cnf file in order to load malicious dll when zabbix start.

       

      As Zabbix service is running with system account, the malicious process has system privilege.

      File attached is a PoC of this problem.

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            Assignee:
            martins-v Martins Valkovskis
            Reporter:
            xdanes09 Xavier DANEST
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              Dates

              Created:
              Updated:
              Resolved: