CVE-2009-4500

The process_trap function in trapper/trapper.c in Zabbix Server before 1.6.6 allows remote attackers to cause a denial of service (crash) via a crafted request with data that lacks an expected : (colon) separator, which triggers a NULL pointer dereference.

Published: 2009-12-31 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-4500 is rated Moderate Risk (44/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.73%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-4500

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 1.41% 0.73% -0.67%
2 2025-03-29 0.74% 1.41% +0.66%
3 2024-09-17 — 0.74% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-4500

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2009-4500

OS Trackers for CVE-2009-4500

vendor priority summary link
debian not yet assigned CVE-2009-4500 not yet assigned priority: Debian including 1 source packages (zabbix), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-4500
ubuntu low CVE-2009-4500 low priority: Ubuntu including 1 source packages (zabbix), 10 status rows across 10 suites (dapper, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): ignored 4, not-affected 4, DNE 1, released 1. https://ubuntu.com/security/CVE-2009-4500

Affected software / configurations for CVE-2009-4500

Vendor Product Version Raw CPE
zabbix zabbix <= 1.4.6 cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*
zabbix zabbix 1.1.2 cpe:2.3:a:zabbix:zabbix:1.1.2:*:*:*:*:*:*:*
zabbix zabbix 1.1.3 cpe:2.3:a:zabbix:zabbix:1.1.3:*:*:*:*:*:*:*
zabbix zabbix 1.1.4 cpe:2.3:a:zabbix:zabbix:1.1.4:*:*:*:*:*:*:*
zabbix zabbix 1.1.5 cpe:2.3:a:zabbix:zabbix:1.1.5:*:*:*:*:*:*:*
zabbix zabbix 1.4.2 cpe:2.3:a:zabbix:zabbix:1.4.2:*:*:*:*:*:*:*
zabbix zabbix 1.4.3 cpe:2.3:a:zabbix:zabbix:1.4.3:*:*:*:*:*:*:*
zabbix zabbix 1.4.4 cpe:2.3:a:zabbix:zabbix:1.4.4:*:*:*:*:*:*:*

References for CVE-2009-4500

cvelogic Threat Intelligence