GLSA 200805-23: Samba: Heap-based buffer overflow

http://security.gentoo.org/

Severity:	normal
Title:	Samba: Heap-based buffer overflow
Date:	05/29/2008
Bugs:	#222299
ID:	200805-23

Synopsis

A heap-based buffer overflow vulnerability was found in Samba, allowing for the execution of arbitrary code.

Background

Samba is a suite of SMB and CIFS client/server programs.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-fs/samba	< 3.0.28a-r1	>= 3.0.28a-r1	All supported architectures

Description

Alin Rad Pop (Secunia Research) reported a vulnerability in Samba within the receive_smb_raw() function in the file lib/util_sock.c when parsing SMB packets, possibly leading to a heap-based buffer overflow via an overly large SMB packet.

Impact

A remote attacker could possibly exploit this vulnerability by enticing a user to connect to a malicious server or by sending specially crafted packets to an nmbd server configured as a local or domain master browser, resulting in the execution of arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All Samba users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-fs/samba-3.0.28a-r1"

References

CVE-2008-1105

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200805-23.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.