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

http://security.gentoo.org/

Severity:	high
Title:	Snort: Remote execution of arbitrary code
Date:	02/23/2007
Bugs:	#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	Vulnerable	Unaffected	Architecture(s)
net-analyzer/snort	< 2.6.1.3	>= 2.6.1.3	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:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/snort-2.6.1.3"

References

CVE-2006-5276

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200703-01.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.