[ GLSA 200703-01 ] Snort: Remote execution of arbitrary code

[GLSA]

Gentoo Linux Security Advisory

Title: Snort: Remote execution of arbitrary code (GLSA 200703-01)
Severity: high
Exploitable: remote
Date: February 23, 2007
Updated: March 02, 2007
Bug(s): #167730
ID: 200703-01

Synopsis


The Snort DCE/RPC preprocessor contains a buffer overflow that could result
in the remote execution of arbitrary code.


Background


Snort is a widely deployed intrusion detection program.


Affected Packages

Package: net-analyzer/snort
Vulnerable: < 2.6.1.3
Unaffected: >= 2.6.1.3
Architectures: All supported architectures


Description


The Snort DCE/RPC preprocessor does not properly reassemble certain
types of fragmented SMB and DCE/RPC packets.


Impact


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.


Workaround


Disable the DCE/RPC processor by commenting the 'preprocessor dcerpc'
section in /etc/snort/snort.conf .


Resolution


All Snort users should upgrade to the latest version: