Zabbix zabbix_agentd vfs.file.cksum denial of service

zabbix-zabbixagentd-vfsfilecksum-dos (69378) The risk level is classified as MediumMedium Risk

Description:

Zabbix is vulnerable to a denial of service, caused by an error in zabbix_agentd. By executing the vfs.file.cksum command for a special device, a remote attacker could exploit this vulnerability to consume all available CPU resources.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Zabbix (1.8.6 or 1.9.4 or later), available from the Zabbix Web site. See References.

References:

  • Zabbix Web Site: Homepage of Zabbix :: An Enterprise-Class Open Source Distributed Monitoring Solution.
  • ZBX-3794: zabbix_agentd DoS attack with vfs.file.cksum.
  • CVE-2011-3263: zabbix_agentd in Zabbix before 1.8.6 and 1.9.x before 1.9.4 allows context-dependent attackers to cause a denial of service (CPU consumption) by executing the vfs.file.cksum command for a special device, as demonstrated by the /dev/urandom device.
  • OSVDB ID: 74667: Zabbix zabbix_agentd vfs.file.cksum Command CPU Consumption DoS

Platforms Affected:

  • Zabbix Zabbix 1.1 Beta7
  • Zabbix Zabbix 1.1 Beta2
  • Zabbix Zabbix 1.1 Beta5
  • Zabbix Zabbix 1.1 Beta6
  • Zabbix Zabbix 1.1 Beta12
  • Zabbix Zabbix 1.1 Beta11
  • Zabbix Zabbix 1.1 Beta10
  • Zabbix Zabbix 1.1 Beta3
  • Zabbix Zabbix 1.1 Beta4
  • Zabbix Zabbix 1.1 Beta9
  • Zabbix Zabbix 1.1
  • Zabbix Zabbix 1.1 Beta8
  • Zabbix Zabbix 1.1.1
  • Zabbix Zabbix 1.1.2
  • Zabbix Zabbix 1.1.3
  • Zabbix Zabbix 1.1.4
  • Zabbix Zabbix 1.1.5
  • Zabbix Zabbix 1.1.6
  • Zabbix Zabbix 1.1.7
  • Zabbix Zabbix 1.3 Beta
  • Zabbix Zabbix 1.3.1 Beta
  • Zabbix Zabbix 1.3.2 Beta
  • Zabbix Zabbix 1.3.3 Beta
  • Zabbix Zabbix 1.3.4 Beta
  • Zabbix Zabbix 1.3.5 Beta
  • Zabbix Zabbix 1.3.6 Beta
  • Zabbix Zabbix 1.3.7 Beta
  • Zabbix Zabbix 1.3.8 Beta
  • Zabbix Zabbix 1.4.2
  • Zabbix Zabbix 1.4.3
  • Zabbix Zabbix 1.4.4
  • Zabbix Zabbix 1.4.5
  • Zabbix Zabbix 1.4.6
  • Zabbix Zabbix 1.5 Beta
  • Zabbix Zabbix 1.5.1 Beta
  • Zabbix Zabbix 1.5.2 Beta
  • Zabbix Zabbix 1.5.3 Beta
  • Zabbix Zabbix 1.5.4 Beta
  • Zabbix Zabbix 1.6
  • Zabbix Zabbix 1.6.1
  • Zabbix Zabbix 1.6.2
  • Zabbix Zabbix 1.6.3
  • Zabbix Zabbix 1.6.4
  • Zabbix Zabbix 1.6.5
  • Zabbix Zabbix 1.6.6
  • Zabbix Zabbix 1.6.7
  • Zabbix Zabbix 1.6.8
  • Zabbix Zabbix 1.6.9
  • Zabbix Zabbix 1.7
  • Zabbix Zabbix 1.7.1
  • Zabbix Zabbix 1.7.2
  • Zabbix Zabbix 1.7.3
  • Zabbix Zabbix 1.7.4
  • Zabbix Zabbix 1.8
  • Zabbix Zabbix 1.8.1
  • Zabbix Zabbix 1.8.2
  • Zabbix Zabbix 1.8.3 Rc2
  • Zabbix Zabbix 1.8.3 Rc1
  • Zabbix Zabbix 1.8.3 Rc3
  • Zabbix Zabbix 1.8.3
  • Zabbix Zabbix 1.8.4
  • Zabbix Zabbix 1.8.4 rc1
  • Zabbix Zabbix 1.8.4 rc2
  • Zabbix Zabbix 1.8.4 rc3
  • Zabbix Zabbix 1.8.4 rc4
  • Zabbix Zabbix 1.8.5 rc1
  • Zabbix Zabbix 1.8.5
  • Zabbix Zabbix 1.9.0 Alpha
  • Zabbix Zabbix 1.9.1 Alpha
  • Zabbix Zabbix 1.9.2 Alpha
  • Zabbix Zabbix 1.9.3 Alpha

Reported:

May 16, 2011

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