Mailing the story:
Mandrake alert: Updated snort packages fix buffer overflow vulnerability
A buffer overflow was discovered in the snort RPC normalization routines by ISS-XForce which can cause snort to execute arbitrary code embedded within sniffed network packets. The rpc_decode preprocessor is enabled by default. The snort developers have released version 1.9.1 to correct this behaviour; snort versions from 1.8 up to 1.9.0 are vulnerable.