CVE-2009-1902

CVE-2009-1902 is a medium-severity vulnerability in Trustwave Modsecurity with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-476.

Key facts

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.

Frequently asked questions

What is 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.
How severe is CVE-2009-1902?
CVE-2009-1902 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-1902 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1902?
CVE-2009-1902 primarily affects Trustwave Modsecurity. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1902?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-1902 published?
CVE-2009-1902 was published on 2009-06-03 and last updated on 2026-06-16.

References

Affected products (3)

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