Description
zabbix_agentd in ZABBIX 1.4.4 allows remote attackers to cause a denial of service (CPU and connection consumption) via multiple vfs.file.cksum commands with a special device node such as /dev/urandom or /dev/zero.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | zabbix | 1:1.4.5-1 | — |
| Debian 13 | zabbix | 1:1.4.5-1 | — |
| Debian 12 | zabbix | 1:1.4.5-1 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Zabbix 1.1x/1.4.x - File Checksum Request Denial of Service EDB-31403 · dos · Mar 13, 2008 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- ADV-2008-0878 vdb-entry
- 3747 third-party-advisory
- 28244 vdb-entry
- zabbix-zabbixagentd-dos(41196) vdb-entry
- 29383 third-party-advisory
- 20080313 Zabbix (zabbix_agentd) denial of service mailing-list