UpHeron
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Servers and applications

CVE-2009-1902

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.

Severity
Medium 5.0
Published
3 Jun 2009
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
2.5.9
Exploit chance
14% in the next 30 daysHigher than 96% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Null pointer dereference (CWE-476)
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
ModSecurityServers and applications · cpe:a:trustwave:modsecurity
  • Every version before 2.5.9

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-1902
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-1902