Snort is a widely deployed intrusion detection program.
The Snort DCE/RPC preprocessor does not properly reassemble certain types of fragmented SMB and DCE/RPC packets.
A remote attacker could send specially crafted fragmented SMB or DCE/RPC packets, without the need to finish the TCP handshake, that would trigger a stack-based buffer overflow while being reassembled. This could lead to the execution of arbitrary code with the permissions of the user running the Snort preprocessor.
Disable the DCE/RPC processor by commenting the 'preprocessor dcerpc' section in /etc/snort/snort.conf .
All Snort users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-analyzer/snort-18.104.22.168"