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Vulnerability record · CVE-2009-1902 · published 3 June 2009

CVE-2009-1902: Trustwave modsecurity null pointer dereference vulnerability

Trustwave · Modsecurity

The multipart processor in ModSecurity before 2.5.9 allows remote attackers to cause a denial of service (crash) via a multipart form datapost request with a missing part header name, which triggers a NULL pointer dereference.

5.0 CVSS 2.0 Medium EPSS 14% · top 3.6% CWE-476 · NULL pointer dereference
5.0CVSS 2.0 base score
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
28References, 6 tagged exploit
16 Jun 2026Last modified by NVD

Description

The multipart processor in ModSecurity before 2.5.9 allows remote attackers to cause a denial of service (crash) via a multipart form datapost request with a missing part header name, which triggers a NULL pointer dereference.

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

Affected products

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

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html Not Applicable
http://secunia.com/advisories/34256 Third Party Advisory
http://secunia.com/advisories/34311 Third Party Advisory
http://secunia.com/advisories/35687 Third Party Advisory
http://security.gentoo.org/glsa/glsa-200907-02.xml Third Party Advisory
http://sourceforge.net/project/shownotes.php?release_id=667542&group_id=68846 Third Party Advisory
http://www.osvdb.org/52553 Broken Link
http://www.securityfocus.com/archive/1/501968 ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/34096 ExploitThird Party AdvisoryVDB Entry
http://www.vupen.com/english/advisories/2009/0703 Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/49212 Third Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/8241 ExploitThird Party AdvisoryVDB Entry
https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00487.html Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00529.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html Not Applicable
http://secunia.com/advisories/34256 Third Party Advisory
http://secunia.com/advisories/34311 Third Party Advisory
http://secunia.com/advisories/35687 Third Party Advisory
http://security.gentoo.org/glsa/glsa-200907-02.xml Third Party Advisory
http://sourceforge.net/project/shownotes.php?release_id=667542&group_id=68846 Third Party Advisory
http://www.osvdb.org/52553 Broken Link
http://www.securityfocus.com/archive/1/501968 ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/34096 ExploitThird Party AdvisoryVDB Entry
http://www.vupen.com/english/advisories/2009/0703 Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/49212 Third Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/8241 ExploitThird Party AdvisoryVDB Entry
https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00487.html Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00529.html Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2009-1902), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.