CentOS 4 / 5 : samba (CESA-2011:1219)

Medium Nessus Plugin ID 55997

Synopsis

The remote CentOS host is missing one or more security updates.

Description

Updated samba packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Samba is a suite of programs used by machines to share files, printers, and other information.

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

A race condition flaw was found in the way the mount.cifs tool mounted CIFS (Common Internet File System) shares. If mount.cifs had the setuid bit set, a local attacker could conduct a symbolic link attack to trick mount.cifs into mounting a share over an arbitrary directory they were otherwise not allowed to mount to, possibly allowing them to escalate their privileges. (CVE-2010-0787)

It was found that the mount.cifs tool did not properly handle share or directory names containing a newline character. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab (mounted file systems table) file via a specially crafted CIFS share mount request.
(CVE-2010-0547)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the samba packages distributed by Red Hat does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

Red Hat would like to thank the Samba project for reporting CVE-2011-2694 and CVE-2011-2522; the Debian Security Team for reporting CVE-2010-0787; and Dan Rosenberg for reporting CVE-2011-1678. Upstream acknowledges Nobuhiro Tsuji of NTT DATA Security Corporation as the original reporter of CVE-2011-2694;
Yoshihiro Ishikawa of LAC Co., Ltd. as the original reporter of CVE-2011-2522; and the Debian Security Team acknowledges Ronald Volgers as the original reporter of CVE-2010-0787.

Users of Samba are advised to upgrade to these updated packages, which contain backported patches to resolve these issues. After installing this update, the smb service will be restarted automatically.

Solution

Update the affected samba packages.

See Also

http://www.nessus.org/u?b6da8e78

http://www.nessus.org/u?a8d50dd8

http://www.nessus.org/u?fe52cf92

http://www.nessus.org/u?74ab0647

http://www.nessus.org/u?29bfd921

http://www.nessus.org/u?7b1868b9

Plugin Details

Severity: Medium

ID: 55997

File Name: centos_RHSA-2011-1219.nasl

Version: 1.16

Type: local

Agent: unix

Published: 2011/08/30

Updated: 2019/10/25

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 6.8

Temporal Score: 5.3

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

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:libsmbclient, p-cpe:/a:centos:centos:libsmbclient-devel, p-cpe:/a:centos:centos:samba, p-cpe:/a:centos:centos:samba-client, p-cpe:/a:centos:centos:samba-common, p-cpe:/a:centos:centos:samba-swat, cpe:/o:centos:centos:4, cpe:/o:centos:centos:5

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2011/08/29

Vulnerability Publication Date: 2010/02/04

Reference Information

CVE: CVE-2010-0547, CVE-2010-0787, CVE-2011-1678, CVE-2011-2522, CVE-2011-2694, CVE-2011-3585

BID: 37992

RHSA: 2011:1219

CWE: 20, 59