[RedHat] Schwachstelle im acpid - RHSA-2009:1642-02

WiN Site Security Contacts win-sec-ssc at lists.dfn-cert.de
Di Dez 8 17:39:18 CET 2009


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Liebe Kolleginnen und Kollegen,

soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.

CVE-2009-4033 - Falsche Rechte auf dem Logfile des ACPI Daemons

  Beim Anlegen des Logfiles (/var/log/acpid) des ACPI Daemons (acpid)
  wurde die explizite Angabe von Rechten fuer die neu erstellte Datei
  vergessen wodurch die Datei zufaellige Rechtekombinationen erhielt. Ein
  lokaler Angreifer kann diese Schwachstelle dazu ausnutzen seine
  Privilegien zu erweitern. 
  
  Die Schwachstelle betrifft nur RedHat Enterprise 5 und vermutlich nur
  64-Bit Plattformen.

Betroffen sind die folgenden Software Pakete und Plattformen:

  Paket acpid

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

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

Hersteller Advisory:
  https://rhn.redhat.com/errata/RHSA-2009-1642.html


(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.

Mit freundlichen Gruessen,
		Klaus Moeller, DFN-CERT

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17. DFN Workshop    "Sicherheit in vernetzten Systemen"    09./10.02.2010
Informationen unter https://www.dfn-cert.de/veranstaltungen/workshop.html

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: acpid security update
Advisory ID:       RHSA-2009:1642-02
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-1642.html
Issue date:        2009-12-07
CVE Names:         CVE-2009-4033 
=====================================================================

1. Summary:

An updated acpid package that fixes one security issue is now available for
Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

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

3. Description:

acpid is a daemon that dispatches ACPI (Advanced Configuration and Power
Interface) events to user-space programs.

It was discovered that acpid could create its log file ("/var/log/acpid")
with random permissions on some systems. A local attacker could use this
flaw to escalate their privileges if the log file was created as
world-writable and with the setuid or setgid bit set. (CVE-2009-4033)

Please note that this flaw was due to a Red Hat-specific patch
(acpid-1.0.4-fd.patch) included in the Red Hat Enterprise Linux 5 acpid
package.

Users are advised to upgrade to this updated package, which contains a
backported patch to correct this issue.

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/docs/DOC-11259

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

515062 - /var/log/acpid has improper permissions
542926 - CVE-2009-4033 acpid: log file created with random permissions

6. Package List:

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/acpid-1.0.4-9.el5_4.1.src.rpm

i386:
acpid-1.0.4-9.el5_4.1.i386.rpm
acpid-debuginfo-1.0.4-9.el5_4.1.i386.rpm

x86_64:
acpid-1.0.4-9.el5_4.1.x86_64.rpm
acpid-debuginfo-1.0.4-9.el5_4.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/acpid-1.0.4-9.el5_4.1.src.rpm

i386:
acpid-1.0.4-9.el5_4.1.i386.rpm
acpid-debuginfo-1.0.4-9.el5_4.1.i386.rpm

ia64:
acpid-1.0.4-9.el5_4.1.ia64.rpm
acpid-debuginfo-1.0.4-9.el5_4.1.ia64.rpm

x86_64:
acpid-1.0.4-9.el5_4.1.x86_64.rpm
acpid-debuginfo-1.0.4-9.el5_4.1.x86_64.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-2009-4033
http://www.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert at redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2009 Red Hat, Inc.
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