Executive Summary

Summary
Titlersync security, bug fix, and enhancement update
Informations
NameRHSA-2011:0999First vendor Publication2011-07-21
VendorRedHatLast vendor Modification2011-07-21
Severity (Vendor) ModerateRevision01

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score10Attack RangeNetwork
Cvss Impact Score10Attack ComplexityLow
Cvss Expoit Score10AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

An updated rsync package that fixes one security issue, several bugs, and
adds enhancements is now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

3. Description:

rsync is a program for synchronizing files over a network.

A flaw was found in the way the rsync daemon handled the "filter",
"exclude", and "exclude from" options, used for hiding files and preventing
access to them from rsync clients. A remote attacker could use this flaw to
bypass those restrictions by using certain command line options and
symbolic links, allowing the attacker to overwrite those files if they knew
their file names and had write access to them. (CVE-2007-6200)

Note: This issue only affected users running rsync as a writable daemon:
"read only" set to "false" in the rsync configuration file (for example,
"/etc/rsyncd.conf"). By default, this option is set to "true".

This update also fixes the following bugs:

* The rsync package has been upgraded to upstream version 3.0.6, which
provides a number of bug fixes and enhancements over the previous version.
(BZ#339971)

* When running an rsync daemon that was receiving files, a deferred info,
error or log message could have been sent directly to the sender instead of
being handled by the "rwrite()" function in the generator. Also, under
certain circumstances, a deferred info or error message from the receiver
could have bypassed the log file and could have been sent only to the
client process. As a result, an "unexpected tag 3" fatal error could have
been displayed. These problems have been fixed in this update so that an
rsync daemon receiving files now works as expected. (BZ#471182)

* Prior to this update, the rsync daemon called a number of timezone-using
functions after doing a chroot. As a result, certain C libraries were
unable to generate proper timestamps from inside a chrooted daemon. This
bug has been fixed in this update so that the rsync daemon now calls the
respective timezone-using functions prior to doing a chroot, and proper
timestamps are now generated as expected. (BZ#575022)

* When running rsync under a non-root user with the "-A" ("--acls") option
and without using the "--numeric-ids" option, if there was an Access
Control List (ACL) that included a group entry for a group that the
respective user was not a member of on the receiving side, the
"acl_set_file()" function returned an invalid argument value ("EINVAL").
This was caused by rsync mistakenly mapping the group name to the Group ID
"GID_NONE" ("-1"), which failed. The bug has been fixed in this update so
that no invalid argument is returned and rsync works as expected.
(BZ#616093)

* When creating a sparse file that was zero blocks long, the "rsync
- --sparse" command did not properly truncate the sparse file at the end of
the copy transaction. As a result, the file size was bigger than expected.
This bug has been fixed in this update by properly truncating the file so
that rsync now copies such files as expected. (BZ#530866)

* Under certain circumstances, when using rsync in daemon mode, rsync
generator instances could have entered an infinitive loop, trying to write
an error message for the receiver to an invalid socket. This problem has
been fixed in this update by adding a new sibling message: when the
receiver is reporting a socket-read error, the generator will notice this
fact and avoid writing an error message down the socket, allowing it to
close down gracefully when the pipe from the receiver closes. (BZ#690148)

* Prior to this update, there were missing deallocations found in the
"start_client()" function. This bug has been fixed in this update and no
longer occurs. (BZ#700450)

All users of rsync are advised to upgrade to this updated package, which
resolves these issues and adds enhancements.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

339971 - [RFE] Rebase rsync packages to version 3
407171 - CVE-2007-6200 rsync excluded content access restrictions bypass via symlinks
471182 - rsync errors: unexpected tag 3 [sender]
530866 - rsync --sparse does not properly copy sparse files
575022 - rsyncd gets confused with timezones when logging to syslog
616093 - EINVAL (Invalid argument) setting group --acls
690148 - Rsync instances stay in memory when using in daemon mode
700450 - Resource leaks revealed by Coverity scan.

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2011-0999.html

CWE : Common Weakness Enumeration

idName
CWE-264Permissions, Privileges, and Access Controls

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:21980
 
Oval ID: oval:org.mitre.oval:def:21980
Title: RHSA-2011:0999: rsync security, bug fix, and enhancement update (Moderate)
Description: Unspecified vulnerability in rsync before 3.0.0pre6, when running a writable rsync daemon, allows remote attackers to bypass exclude, exclude_from, and filter and read or write hidden files via (1) symlink, (2) partial-dir, (3) backup-dir, and unspecified (4) dest options.
Family: unix Class: patch
Reference(s): RHSA-2011:0999-01
CESA-2011:0999
CVE-2007-6200
Version: 4
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Product(s): rsync
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23344
 
Oval ID: oval:org.mitre.oval:def:23344
Title: ELSA-2011:0999: rsync security, bug fix, and enhancement update (Moderate)
Description: Unspecified vulnerability in rsync before 3.0.0pre6, when running a writable rsync daemon, allows remote attackers to bypass exclude, exclude_from, and filter and read or write hidden files via (1) symlink, (2) partial-dir, (3) backup-dir, and unspecified (4) dest options.
Family: unix Class: patch
Reference(s): ELSA-2011:0999-01
CVE-2007-6200
Version: 3
Platform(s): Oracle Linux 5
Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application32

OpenVAS Exploits

DateDescription
2012-07-30Name : CentOS Update for rsync CESA-2011:0999 centos5 x86_64
File : nvt/gb_CESA-2011_0999_rsync_centos5_x86_64.nasl
2011-09-23Name : CentOS Update for rsync CESA-2011:0999 centos5 i386
File : nvt/gb_CESA-2011_0999_rsync_centos5_i386.nasl
2011-07-22Name : RedHat Update for rsync RHSA-2011:0999-01
File : nvt/gb_RHSA-2011_0999-01_rsync.nasl
2010-05-12Name : Mac OS X Security Update 2008-005
File : nvt/macosx_secupd_2008-005.nasl
2009-11-17Name : Mac OS X Version
File : nvt/macosx_version.nasl
2009-10-13Name : SLES10: Security update for rsync
File : nvt/sles10_rsync.nasl
2009-10-10Name : SLES9: Security update for rsync
File : nvt/sles9p5012702.nasl
2009-04-09Name : Mandriva Update for rsync MDVSA-2008:011 (rsync)
File : nvt/gb_mandriva_MDVSA_2008_011.nasl

Open Source Vulnerability Database (OSVDB)

idDescription
39593rsync Unspecified Remote Restriction Bypass

Nessus® Vulnerability Scanner

DateDescription
2012-08-01Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20110721_rsync_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2011-09-23Name : The remote CentOS host is missing a security update.
File : centos_RHSA-2011-0999.nasl - Type : ACT_GATHER_INFO
2011-07-22Name : The remote Red Hat host is missing a security update.
File : redhat-RHSA-2011-0999.nasl - Type : ACT_GATHER_INFO
2009-09-24Name : The remote SuSE 9 host is missing a security-related patch.
File : suse9_12038.nasl - Type : ACT_GATHER_INFO
2009-04-23Name : The remote Mandriva Linux host is missing a security update.
File : mandriva_MDVSA-2008-011.nasl - Type : ACT_GATHER_INFO
2008-08-01Name : The remote host is missing a Mac OS X update that fixes various security issues.
File : macosx_SecUpd2008-005.nasl - Type : ACT_GATHER_INFO
2007-12-24Name : The remote SuSE system is missing the security patch rsync-4793
File : suse_rsync-4793.nasl - Type : ACT_GATHER_INFO
2007-12-24Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_rsync-4798.nasl - Type : ACT_GATHER_INFO

Alert History

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DateInformations
2014-02-17 11:54:53
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