[RHSA-2008:0061-02] Moderate: setroubleshoot security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Moderate: setroubleshoot security and bug fix update

Advisory ID: RHSA-2008:0061-02

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2008-0061.html

Issue date: 2008-05-20

Updated on: 2008-05-21

CVE Names: CVE-2007-5495 CVE-2007-5496

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1. Summary:

 

Updated setroubleshoot packages that fix two security issues and several

bugs are now available for Red Hat Enterprise Linux 5.

 

This update has been rated as having moderate security impact by the Red

Hat Security Response Team.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Desktop (v. 5 client) - noarch

Red Hat Enterprise Linux (v. 5 server) - noarch

 

3. Description:

 

The setroubleshoot packages provide tools to help diagnose SELinux

problems. When AVC messages occur, an alert is generated that gives

information about the problem, and how to create a resolution.

 

A flaw was found in the way sealert wrote diagnostic messages to a

temporary file. A local unprivileged user could perform a symbolic link

attack, and cause arbitrary files, writable by other users, to be

overwritten when a victim runs sealert. (CVE-2007-5495)

 

A flaw was found in the way sealert displayed records from the

setroubleshoot database as unescaped HTML. An local unprivileged attacker

could cause AVC denial events with carefully crafted process or file names,

injecting arbitrary HTML tags into the logs, which could be used as a

scripting attack, or to confuse the user running sealert. (CVE-2007-5496)

 

Additionally, the following bugs have been fixed in these update packages:

 

* in certain situations, the sealert process used excessive CPU. These

alerts are now capped at a maximum of 30, D-Bus is used instead of polling,

threads causing excessive wake-up have been removed, and more robust

exception-handling has been added.

 

* different combinations of the sealert '-a', '-l', '-H', and '-v' options

did not work as documented.

 

* the SETroubleShoot browser did not allow multiple entries to be deleted.

 

* the SETroubleShoot browser did not display statements that displayed

whether SELinux was using Enforcing or Permissive mode, particularly when

warning about SELinux preventions.

 

* in certain cases, the SETroubleShoot browser gave incorrect instructions

regarding paths, and would not display the full paths to files.

 

* adding an email recipient to the recipients option from the

/etc/setroubleshoot/setroubleshoot.cfg file and then generating an SELinux

denial caused a traceback error. The recipients option has been removed;

email addresses are now managed through the SETroubleShoot browser by

navigating to File -> Edit Email Alert List, or by editing the

/var/lib/setroubleshoot/email_alert_recipients file.

 

* the setroubleshoot browser incorrectly displayed a period between the

httpd_sys_content_t context and the directory path.

 

* on the PowerPC architecture, The get_credentials() function in

access_control.py would generate an exception when it called the

socket.getsockopt() function.

 

* The code which handles path information has been completely rewritten so

that assumptions on path information which were misleading are no longer

made. If the path information is not present, it will be presented as

"".

 

* setroubleshoot had problems with non-English locales under certain

circumstances, possibly causing a python traceback, an sealert window

pop-up containing an error, a "RuntimeError: maximum recursion depth

exceeded" error after a traceback, or a "UnicodeEncodeError" after a traceback.

 

* sealert ran even when SELinux was disabled, causing "attempt to open

server connection failed" errors. Sealert now checks whether SELinux is

enabled or disabled.

 

* the database setroubleshoot maintains was world-readable. The

setroubleshoot database is now mode 600, and is owned by the root user and

group.

 

* setroubleshoot did not validate requests to set AVC filtering options for

users. In these updated packages, checks ensure that requests originate

from the filter owner.

 

* the previous setroubleshoot packages required a number of GNOME packages

and libraries. setroubleshoot has therefore been split into 2 packages:

setroubleshoot and setroubleshoot-server.

 

* a bug in decoding the audit field caused an "Input is not proper UTF-8,

indicate encoding!" error message. The decoding code has been rewritten.

 

* a file name mismatch in the setroubleshoot init script would cause a

failure to shut down.

 

Users of setroubleshoot are advised to upgrade to these updated packages,

which resolve these issues.

 

4. Solution:

 

Before applying this update, make sure that all previously-released

errata relevant to your system have been applied.

 

This update is available via Red Hat Network. Details on how to use

the Red Hat Network to apply this update are available at

http://kbase.redhat.com/faq/FAQ_58_10188

 

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

 

227806 - setroubleshoot browser doesn't allow multiple entry deletion

240355 - setroubleshoot gives bad suggestions

241543 - Adding recipents entry to config file crashes setroubleshoot

243800 - typo in sealert / setroubleshoot suggestion

244345 - missing filename in setroubleshoot (AVC.get_path() returns incomplete path)

250239 - Runtime Error: maximum recursion depth exceeded

288221 - CVE-2007-5495 setroubleshoot insecure logging

288271 - CVE-2007-5496 setroubleshoot log injection

288881 - setroubleshoot failure when httpd is trying to access rpm_log_t

312281 - setroubleshoot requires gnome to run

431768 - setroubleshoot - audit_listener_database.xml:3029: parser error in xmlParseDoc()

436564 - socket.getsockopt() on ppc generates exception

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 5 client):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/setroubleshoot-2.0.5-3.el5.src.rpm

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/setroubleshoot-plugins-2.0.4-2.el5.src.rpm

 

noarch:

setroubleshoot-2.0.5-3.el5.noarch.rpm

setroubleshoot-plugins-2.0.4-2.el5.noarch.rpm

setroubleshoot-server-2.0.5-3.el5.noarch.rpm

 

Red Hat Enterprise Linux (v. 5 server):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/setroubleshoot-2.0.5-3.el5.src.rpm

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/setroubleshoot-plugins-2.0.4-2.el5.src.rpm

 

noarch:

setroubleshoot-2.0.5-3.el5.noarch.rpm

setroubleshoot-plugins-2.0.4-2.el5.noarch.rpm

setroubleshoot-server-2.0.5-3.el5.noarch.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://www.redhat.com/security/team/key/#package

 

7. References:

 

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5495

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5496

http://www.redhat.com/security/updates/classification/#moderate

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://www.redhat.com/security/team/contact/

 

Copyright 2008 Red Hat, Inc.

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