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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-1032

Bypassing EnableRemoteCommands=0 in Zabbix Client.

    Details

    • Type: Incident report
    • Status: Closed
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.6.6, 1.9.0 (alpha)
    • Component/s: Agent (G)
    • Labels:
      None

      Description

      Has been found a security vulnerability in Zabbix Client allowing to execute OS commands, even if EnableRemoteCommands is set to "0". This was tested on Zabbbix 1.6.5. The IP address check is not bypassed, so the attacker must come from (or spoof) a valid Zabbix Server. This bug exists only in FreeBSD and Solaris agents.

      In ./src/libs/zbxsysinfo/(freebsd|solaris)/net.c, a user defined variable "param" is used to create "command" which is executed.

      Exploit :
      $> echo "net.tcp.listen[80';id >/tmp/ID ; echo ']"|nc testbox 10050

      This will execute "id" on the client and write the result to /tmp/ID.

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            • Assignee:
              Unassigned
              Reporter:
              igor Igor Danoshaites (Inactive)
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              Dates

              • Created:
                Updated:
                Resolved: