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Vulnerability record · CVE-2009-4501 · published 31 December 2009

CVE-2009-4501: Zabbix memory buffer overflow vulnerability

Zabbix · Zabbix

The zbx_get_next_field function in libs/zbxcommon/str.c in Zabbix Server before 1.6.8 allows remote attackers to cause a denial of service (crash) via a request that lacks expected separators, which triggers a NULL pointer dereference, as demonstrated using the Command keyword.

5.0 CVSS 2.0 Medium EPSS 8.5% · top 5.1% CWE-119 · Memory buffer overflow
5.0CVSS 2.0 base score
8.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

The zbx_get_next_field function in libs/zbxcommon/str.c in Zabbix Server before 1.6.8 allows remote attackers to cause a denial of service (crash) via a request that lacks expected separators, which triggers a NULL pointer dereference, as demonstrated using the Command keyword.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://secunia.com/advisories/37740 Vendor Advisory
http://www.securityfocus.com/archive/1/508436/30/60/threaded Patch
http://www.vupen.com/english/advisories/2009/3514 Vendor Advisory
https://support.zabbix.com/browse/ZBX-1355
http://secunia.com/advisories/37740 Vendor Advisory
http://www.securityfocus.com/archive/1/508436/30/60/threaded Patch
http://www.vupen.com/english/advisories/2009/3514 Vendor Advisory
https://support.zabbix.com/browse/ZBX-1355

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-4501), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.