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GLSA-200407-21 : Samba: Multiple buffer overflows

critical Nessus Plugin ID 14554

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-200407-21 (Samba: Multiple buffer overflows)

 Evgeny Demidov found a buffer overflow in SWAT, located in the base64 data decoder used to handle HTTP basic authentication (CAN-2004-0600). The same flaw is present in the code used to handle the sambaMungedDial attribute value, when using the ldapsam passdb backend. Another buffer overflow was found in the code used to support the 'mangling method = hash' smb.conf option (CAN-2004-0686). Note that the default Samba value for this option is 'mangling method = hash2' which is not vulnerable.
 Impact :

 The SWAT authentication overflow could be exploited to execute arbitrary code with the rights of the Samba daemon process. The overflow in the sambaMungedDial handling code is not thought to be exploitable. The buffer overflow in 'mangling method = hash' code could also be used to execute arbitrary code on vulnerable configurations.
 Workaround :

 Users disabling SWAT, not using ldapsam passdb backends and not using the 'mangling method = hash' option are not vulnerable.

Solution

All Samba users should upgrade to the latest version:
 # emerge sync # emerge -pv '>=net-fs/samba-3.0.5' # emerge '>=net-fs/samba-3.0.5'

See Also

https://www.samba.org/samba/history/samba-3.0.5.html

https://security.gentoo.org/glsa/200407-21

Plugin Details

Severity: Critical

ID: 14554

File Name: gentoo_GLSA-200407-21.nasl

Version: 1.18

Type: local

Published: 8/30/2004

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:samba, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 7/29/2004

Reference Information

CVE: CVE-2004-0600, CVE-2004-0686

GLSA: 200407-21