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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-3794

zabbix_agentd DoS attack with vfs.file.cksum

    Details

    • Type: Incident report
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.8.6, 1.9.4 (alpha)
    • Component/s: Agent (G)
    • Labels:
      None
    • Environment:
      *NIX

      Description

      If you feed a checksum generator a special device i. e. /dev/urandom the CPU load jumps to 100 %. Steps to reproduce on *NIX:

      • start zabbix_agentd
      • run: echo "vfs.file.cksum[/dev/urandom]" | nc 127.0.0.1 10050
      • observe cpu load with command: top

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            • Assignee:
              dimir dimir
              Reporter:
              dimir dimir
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              Dates

              • Created:
                Updated:
                Resolved: