---------------------------------------------------------------------- A new version (0.9.0.0 - Release Candidate 1) of the free Secunia PSI has been released. The new version includes many new and advanced features, which makes it even easier to stay patched. Download and test it today: https://psi.secunia.com/ Read more about this new version: https://psi.secunia.com/?page=changelog ---------------------------------------------------------------------- TITLE: ZABBIX "vfs.file.cksum" Denial of Service Vulnerability SECUNIA ADVISORY ID: SA29383 VERIFY ADVISORY: http://secunia.com/advisories/29383/ CRITICAL: Less critical IMPACT: DoS WHERE: >From remote SOFTWARE: ZABBIX 1.x http://secunia.com/product/12242/ DESCRIPTION: Milen Rangelov has discovered a vulnerability in ZABBIX, which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerability is caused due to the improper implementation of the "vfs.file.cksum" command in "zabbix_agentd". This can be exploited to disable the processing of valid requests via multiple "vfs.file.cksum" commands, having e.g. "/dev/urandom" as a parameter, sent to the port on which "zabbix_agentd" is listening (port 10050/TCP by default). Successful exploitation requires that the malicious requests are sent from an authorized host. The vulnerability is confirmed in version 1.4.4. Other versions may also be affected. SOLUTION: Restrict access to trusted hosts only. PROVIDED AND/OR DISCOVERED BY: Milen Rangelov ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------