Samba: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200411-21 / samba
Release Date	November 11, 2004
Latest Revision	November 15, 2004: 02
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-fs/samba	< 3.0.8	>= 3.0.8, < 3.0	All supported architectures

Related bugreports: #70429

Synopsis

Samba is vulnerable to a buffer overflow that could lead to execution of arbitrary code (CAN-2004-0882). Another flaw in Samba may allow a remote attacker to cause a Denial of Service by excessive consumption of CPU cycles (CAN-2004-0930).

2. Impact Information

Background

Samba is a freely available SMB/CIFS implementation which allows seamless interoperability of file and print services to other SMB/CIFS clients.

Description

Samba fails to do proper bounds checking when handling TRANSACT2_QFILEPATHINFO replies. Additionally an input validation flaw exists in ms_fnmatch.c when matching filenames that contain wildcards.

Impact

An attacker may be able to execute arbitrary code with the permissions of the user running Samba. A remote attacker may also be able to cause an abnormal consumption of CPU resources, resulting in slower performance of the server or even a Denial of Service.

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-3.0.8"

4. References

Updated November 11, 2004

Summary: This is a Gentoo Linux Security Advisory

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