What’s Vulnerable › Vulnerabilities

CVE-2009-1902

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 13.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2009-06-03 · updated 2026-06-16
• Weakness: CWE-476

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.

Affected products

• Fedoraproject Fedora: 9, 10
• Trustwave Modsecurity: before 2.5.9 — fixed in 2.5.9

How to fix

Upgrade to a fixed version: Trustwave Modsecurity 2.5.9. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html
• http://secunia.com/advisories/34256
• http://secunia.com/advisories/34311
• http://secunia.com/advisories/35687
• http://security.gentoo.org/glsa/glsa-200907-02.xml
• http://sourceforge.net/project/shownotes.php?release_id=667542&group_id=68846
• http://www.osvdb.org/52553
• http://www.securityfocus.com/archive/1/501968
• http://www.securityfocus.com/bid/34096
• http://www.vupen.com/english/advisories/2009/0703
• https://exchange.xforce.ibmcloud.com/vulnerabilities/49212
• https://www.exploit-db.com/exploits/8241

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