[RedHat] Mehrere Schwachstellen im Apache Webserver

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Liebe Kolleginnen und Kollegen,

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

CVE-2011-3368 – Schwachstelle im Apache Modul mod_proxy

In dem Apache Modul mod_proxy ist in Verbindung mit RewriteRule und
ProxyPassMatch eine Schwachstelle bei Pattern Matches fuer die
Konfiguration eines Reverse Proxy vorhanden. Ein entfernter Angreifer
kann diese Schwachstelle mit einer entsprechenden URL ausnutzen, um eine
Anfrage an Intranet Webserver zu senden.

CVE-2011-3192 – Denial of Service-Schwachstelle in Apache

Im Apache HTTP Server Version 1.3.x bzw. 2.0.x bis 2.0.64 und 2.2.x bis
Version 2.2.19 besteht ein Fehler bei der Verarbeitung des HTTP-Header
Feldes “Range”, mit dem Teile eines Dokumentes vom Webserver angefordert
werden koennen. Ein entfernter Angreifer kann dies ausnutzen, um durch
Senden verschiedener Werte fuer das Range-Feld, die sich ueberschneiden
und in einer unsortierten Reihenfolge abgeschickt werden, eine sehr hohe
Speicher- und CPU-Auslastung erzeugen, welche den Webserver zum Absturz
oder zum Stillstand bringen kann.

Betroffen sind die folgenden Software Pakete und Plattformen:

Paket httpd

RHEL Desktop Workstation (v. 5 client) – i386, x86_64
Red Hat Enterprise Linux (v. 5 server) – i386, ia64, ppc, s390x,
x86_64
Red Hat Enterprise Linux AS version 4 – i386, ia64, ppc, s390, s390x,
x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) – i386, x86_64
Red Hat Enterprise Linux Desktop version 4 – i386, x86_64
Red Hat Enterprise Linux ES version 4 – i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 – i386, ia64, x86_64

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

(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,
Detlev O. Matthies

– —

Detlev O. Matthies, M.Sc. (Incident Response Team)

DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-590
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737
Sachsenstrasse 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski

Automatische Warnmeldungen https://www.cert.dfn.de/autowarn

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

Synopsis: Moderate: httpd security and bug fix update
Advisory ID: RHSA-2011:1392-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1392.html
Issue date: 2011-10-20
CVE Names: CVE-2011-3368
=====================================================================

1. Summary:

Updated httpd packages that fix one security issue and one bug 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. 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:

RHEL Desktop Workstation (v. 5 client) – i386, x86_64
Red Hat Enterprise Linux (v. 5 server) – i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux AS version 4 – i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) – i386, x86_64
Red Hat Enterprise Linux Desktop version 4 – i386, x86_64
Red Hat Enterprise Linux ES version 4 – i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 – i386, ia64, x86_64

3. Description:

The Apache HTTP Server is a popular web server.

It was discovered that the Apache HTTP Server did not properly validate the
request URI for proxied requests. In certain configurations, if a reverse
proxy used the ProxyPassMatch directive, or if it used the RewriteRule
directive with the proxy flag, a remote attacker could make the proxy
connect to an arbitrary server, possibly disclosing sensitive information
from internal web servers not directly accessible to the attacker.
(CVE-2011-3368)

Red Hat would like to thank Context Information Security for reporting this
issue.

This update also fixes the following bug:

* The fix for CVE-2011-3192 provided by the RHSA-2011:1245 update
introduced regressions in the way httpd handled certain Range HTTP header
values. This update corrects those regressions. (BZ#736593, BZ#736594)

All httpd users should upgrade to these updated packages, which contain
backported patches to correct these issues. After installing the updated
packages, the httpd daemon must be restarted for the update to take effect.

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/):

736593 – httpd: RHSA-2011:1245 regressions [rhel-5]
736594 – httpd: RHSA-2011:1245 regressions [rhel-4]
740045 – CVE-2011-3368 httpd: reverse web proxy vulnerability

6. Package List:

Red Hat Enterprise Linux AS version 4:

Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/httpd-2.0.52-49.ent.src.rpm

i386:
httpd-2.0.52-49.ent.i386.rpm
httpd-debuginfo-2.0.52-49.ent.i386.rpm
httpd-devel-2.0.52-49.ent.i386.rpm
httpd-manual-2.0.52-49.ent.i386.rpm
httpd-suexec-2.0.52-49.ent.i386.rpm
mod_ssl-2.0.52-49.ent.i386.rpm

ia64:
httpd-2.0.52-49.ent.ia64.rpm
httpd-debuginfo-2.0.52-49.ent.ia64.rpm
httpd-devel-2.0.52-49.ent.ia64.rpm
httpd-manual-2.0.52-49.ent.ia64.rpm
httpd-suexec-2.0.52-49.ent.ia64.rpm
mod_ssl-2.0.52-49.ent.ia64.rpm

ppc:
httpd-2.0.52-49.ent.ppc.rpm
httpd-debuginfo-2.0.52-49.ent.ppc.rpm
httpd-devel-2.0.52-49.ent.ppc.rpm
httpd-manual-2.0.52-49.ent.ppc.rpm
httpd-suexec-2.0.52-49.ent.ppc.rpm
mod_ssl-2.0.52-49.ent.ppc.rpm

s390:
httpd-2.0.52-49.ent.s390.rpm
httpd-debuginfo-2.0.52-49.ent.s390.rpm
httpd-devel-2.0.52-49.ent.s390.rpm
httpd-manual-2.0.52-49.ent.s390.rpm
httpd-suexec-2.0.52-49.ent.s390.rpm
mod_ssl-2.0.52-49.ent.s390.rpm

s390x:
httpd-2.0.52-49.ent.s390x.rpm
httpd-debuginfo-2.0.52-49.ent.s390x.rpm
httpd-devel-2.0.52-49.ent.s390x.rpm
httpd-manual-2.0.52-49.ent.s390x.rpm
httpd-suexec-2.0.52-49.ent.s390x.rpm
mod_ssl-2.0.52-49.ent.s390x.rpm

x86_64:
httpd-2.0.52-49.ent.x86_64.rpm
httpd-debuginfo-2.0.52-49.ent.x86_64.rpm
httpd-devel-2.0.52-49.ent.x86_64.rpm
httpd-manual-2.0.52-49.ent.x86_64.rpm
httpd-suexec-2.0.52-49.ent.x86_64.rpm
mod_ssl-2.0.52-49.ent.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/httpd-2.0.52-49.ent.src.rpm

Red Hat Enterprise Linux ES version 4:

Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/httpd-2.0.52-49.ent.src.rpm

Red Hat Enterprise Linux WS version 4:

Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/httpd-2.0.52-49.ent.src.rpm

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/httpd-2.2.3-53.el5_7.3.src.rpm

i386:
httpd-2.2.3-53.el5_7.3.i386.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm
mod_ssl-2.2.3-53.el5_7.3.i386.rpm

x86_64:
httpd-2.2.3-53.el5_7.3.x86_64.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.x86_64.rpm
mod_ssl-2.2.3-53.el5_7.3.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/httpd-2.2.3-53.el5_7.3.src.rpm

i386:
httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm
httpd-devel-2.2.3-53.el5_7.3.i386.rpm
httpd-manual-2.2.3-53.el5_7.3.i386.rpm

x86_64:
httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.x86_64.rpm
httpd-devel-2.2.3-53.el5_7.3.i386.rpm
httpd-devel-2.2.3-53.el5_7.3.x86_64.rpm
httpd-manual-2.2.3-53.el5_7.3.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/httpd-2.2.3-53.el5_7.3.src.rpm

i386:
httpd-2.2.3-53.el5_7.3.i386.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm
httpd-devel-2.2.3-53.el5_7.3.i386.rpm
httpd-manual-2.2.3-53.el5_7.3.i386.rpm
mod_ssl-2.2.3-53.el5_7.3.i386.rpm

ia64:
httpd-2.2.3-53.el5_7.3.ia64.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.ia64.rpm
httpd-devel-2.2.3-53.el5_7.3.ia64.rpm
httpd-manual-2.2.3-53.el5_7.3.ia64.rpm
mod_ssl-2.2.3-53.el5_7.3.ia64.rpm

ppc:
httpd-2.2.3-53.el5_7.3.ppc.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.ppc.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.ppc64.rpm
httpd-devel-2.2.3-53.el5_7.3.ppc.rpm
httpd-devel-2.2.3-53.el5_7.3.ppc64.rpm
httpd-manual-2.2.3-53.el5_7.3.ppc.rpm
mod_ssl-2.2.3-53.el5_7.3.ppc.rpm

s390x:
httpd-2.2.3-53.el5_7.3.s390x.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.s390.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.s390x.rpm
httpd-devel-2.2.3-53.el5_7.3.s390.rpm
httpd-devel-2.2.3-53.el5_7.3.s390x.rpm
httpd-manual-2.2.3-53.el5_7.3.s390x.rpm
mod_ssl-2.2.3-53.el5_7.3.s390x.rpm

x86_64:
httpd-2.2.3-53.el5_7.3.x86_64.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm
httpd-debuginfo-2.2.3-53.el5_7.3.x86_64.rpm
httpd-devel-2.2.3-53.el5_7.3.i386.rpm
httpd-devel-2.2.3-53.el5_7.3.x86_64.rpm
httpd-manual-2.2.3-53.el5_7.3.x86_64.rpm
mod_ssl-2.2.3-53.el5_7.3.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://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-3368.html
https://access.redhat.com/security/updates/classification/#moderate
https://rhn.redhat.com/errata/RHSA-2011-1245.html

8. Contact:

The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/

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[RedHat] Mehrere Schwachstellen im Apache Webserver - RHSA-2011:1392-01

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[RedHat] Mehrere Schwachstellen im Apache Webserver – RHSA-2011:1392-01

[RedHat] Mehrere Schwachstellen im Apache Webserver - RHSA-2011:1392-01