Samba: Heap-based buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200805-23 / samba
Release Date	May 29, 2008
Latest Revision	May 29, 2008: 01
Impact	normal
Exploitable	remote

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

Related bugreports: #222299

Synopsis

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

2. Impact Information

Background

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

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.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Samba users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4. References

CVE-2008-1105

Updated May 29, 2008

Summary: This is a Gentoo Linux Security Advisory

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