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.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Modsecurity | Trustwave | * | 2.5.9 (excluding) |
| Libapache-mod-security | Ubuntu | jaunty | * |
| Libapache-mod-security | Ubuntu | upstream | * |