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Liebe Kolleginnen und Kollegen,
soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.
CVE-2009-1891 – Schwachstelle im Apache Modul mod_deflate
Das Apache Modul mod_deflate komprimiert eine Datei auch dann noch,
wenn die Verbindung zum anfordernden System bereits beendet wurde.
Angreifer koennen diese Schwachstelle ueber das Netz zu einem Denial
of Service Angriff (CPU-Verbrauch) ausnutzen, indem sie grosse Dateien
anfordern und sofort die Verbindung beenden.
CVE-2009-2412 – Integer Overflows in den Bibliotheken apr und apr-util
In den Bibliotheken apr (Apache Portable Runtime) und apr-util koennen
mehrere Integer Overflows auftreten. Die Funktionen allocator_alloc(),
apr_pcalloc() und apr_palloc() (aus: apr_pools.c), sowie
apr_rmm_malloc(), apr_rmm_calloc() und apr_rmm_realloc() (aus:
util-misc/apr_rmm.c) weisen Groessen nicht richtig zu und koennen
hierdurch Integer Overflows ausloesen. Ein entfernter Angreifer kann
diese Schwachstelle ausnutzen, um beliebige Befehle mit den Rechten
der Anwendung, die diese Bibliotheken verwendet, zur Ausfuehrung zu
bringen.
Betroffen sind die folgenden Software Pakete und Plattformen:
Pakete httpd und mod_ssl
Red Hat Enterprise Linux AS version 3 – i386, ia64, ppc, s390, s390x,
x86_64
Red Hat Desktop version 3 – i386, x86_64
Red Hat Enterprise Linux ES version 3 – i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 – i386, ia64, x86_64
Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.
Hersteller Advisory:
https://rhn.redhat.com/errata/RHSA-2009-1205.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
– —
Dipl. Inform. Klaus Moeller (Incident Response Team)
Phone: +49 40 808077-555, Fax: +49 40 808077-556
DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-555
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737
Sachsenstrase 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski
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=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: httpd security and bug fix update
Advisory ID: RHSA-2009:1205-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2009-1205.html
Issue date: 2009-08-10
CVE Names: CVE-2009-1891 CVE-2009-2412
=====================================================================
1. Summary:
Updated httpd packages that fix multiple security issues and a bug are now
available for Red Hat Enterprise Linux 3.
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 AS version 3 – i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 – i386, x86_64
Red Hat Enterprise Linux ES version 3 – i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 – i386, ia64, x86_64
3. Description:
The Apache HTTP Server is a popular Web server. The httpd package shipped
with Red Hat Enterprise Linux 3 contains embedded copies of the Apache
Portable Runtime (APR) libraries, which provide a free library of C data
structures and routines, and also additional utility interfaces to support
XML parsing, LDAP, database interfaces, URI parsing, and more.
Multiple integer overflow flaws, leading to heap-based buffer overflows,
were found in the way the Apache Portable Runtime (APR) manages memory pool
and relocatable memory allocations. An attacker could use these flaws to
issue a specially-crafted request for memory allocation, which would lead
to a denial of service (application crash) or, potentially, execute
arbitrary code with the privileges of an application using the APR
libraries. (CVE-2009-2412)
A denial of service flaw was found in the Apache mod_deflate module. This
module continued to compress large files until compression was complete,
even if the network connection that requested the content was closed
before compression completed. This would cause mod_deflate to consume
large amounts of CPU if mod_deflate was enabled for a large file.
(CVE-2009-1891)
This update also fixes the following bug:
* in some cases the Content-Length header was dropped from HEAD responses.
This resulted in certain sites not working correctly with mod_proxy, such
as www.windowsupdate.com. (BZ#506016)
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 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/):
506016 – windowsupdate.microsoft.com does not work with mod_proxy
509125 – CVE-2009-1891 httpd: possible temporary DoS (CPU consumption) in mod_deflate
515698 – CVE-2009-2412 apr, apr-util: Integer overflows in memory pool (apr) and relocatable memory (apr-util) management
6. Package List:
Red Hat Enterprise Linux AS version 3:
Source:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/httpd-2.0.46-75.ent.src.rpm
i386:
httpd-2.0.46-75.ent.i386.rpm
httpd-debuginfo-2.0.46-75.ent.i386.rpm
httpd-devel-2.0.46-75.ent.i386.rpm
mod_ssl-2.0.46-75.ent.i386.rpm
ia64:
httpd-2.0.46-75.ent.ia64.rpm
httpd-debuginfo-2.0.46-75.ent.ia64.rpm
httpd-devel-2.0.46-75.ent.ia64.rpm
mod_ssl-2.0.46-75.ent.ia64.rpm
ppc:
httpd-2.0.46-75.ent.ppc.rpm
httpd-debuginfo-2.0.46-75.ent.ppc.rpm
httpd-devel-2.0.46-75.ent.ppc.rpm
mod_ssl-2.0.46-75.ent.ppc.rpm
s390:
httpd-2.0.46-75.ent.s390.rpm
httpd-debuginfo-2.0.46-75.ent.s390.rpm
httpd-devel-2.0.46-75.ent.s390.rpm
mod_ssl-2.0.46-75.ent.s390.rpm
s390x:
httpd-2.0.46-75.ent.s390x.rpm
httpd-debuginfo-2.0.46-75.ent.s390x.rpm
httpd-devel-2.0.46-75.ent.s390x.rpm
mod_ssl-2.0.46-75.ent.s390x.rpm
x86_64:
httpd-2.0.46-75.ent.x86_64.rpm
httpd-debuginfo-2.0.46-75.ent.x86_64.rpm
httpd-devel-2.0.46-75.ent.x86_64.rpm
mod_ssl-2.0.46-75.ent.x86_64.rpm
Red Hat Desktop version 3:
Source:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/httpd-2.0.46-75.ent.src.rpm
i386:
httpd-2.0.46-75.ent.i386.rpm
httpd-debuginfo-2.0.46-75.ent.i386.rpm
httpd-devel-2.0.46-75.ent.i386.rpm
mod_ssl-2.0.46-75.ent.i386.rpm
x86_64:
httpd-2.0.46-75.ent.x86_64.rpm
httpd-debuginfo-2.0.46-75.ent.x86_64.rpm
httpd-devel-2.0.46-75.ent.x86_64.rpm
mod_ssl-2.0.46-75.ent.x86_64.rpm
Red Hat Enterprise Linux ES version 3:
Source:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/httpd-2.0.46-75.ent.src.rpm
i386:
httpd-2.0.46-75.ent.i386.rpm
httpd-debuginfo-2.0.46-75.ent.i386.rpm
httpd-devel-2.0.46-75.ent.i386.rpm
mod_ssl-2.0.46-75.ent.i386.rpm
ia64:
httpd-2.0.46-75.ent.ia64.rpm
httpd-debuginfo-2.0.46-75.ent.ia64.rpm
httpd-devel-2.0.46-75.ent.ia64.rpm
mod_ssl-2.0.46-75.ent.ia64.rpm
x86_64:
httpd-2.0.46-75.ent.x86_64.rpm
httpd-debuginfo-2.0.46-75.ent.x86_64.rpm
httpd-devel-2.0.46-75.ent.x86_64.rpm
mod_ssl-2.0.46-75.ent.x86_64.rpm
Red Hat Enterprise Linux WS version 3:
Source:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/httpd-2.0.46-75.ent.src.rpm
i386:
httpd-2.0.46-75.ent.i386.rpm
httpd-debuginfo-2.0.46-75.ent.i386.rpm
httpd-devel-2.0.46-75.ent.i386.rpm
mod_ssl-2.0.46-75.ent.i386.rpm
ia64:
httpd-2.0.46-75.ent.ia64.rpm
httpd-debuginfo-2.0.46-75.ent.ia64.rpm
httpd-devel-2.0.46-75.ent.ia64.rpm
mod_ssl-2.0.46-75.ent.ia64.rpm
x86_64:
httpd-2.0.46-75.ent.x86_64.rpm
httpd-debuginfo-2.0.46-75.ent.x86_64.rpm
httpd-devel-2.0.46-75.ent.x86_64.rpm
mod_ssl-2.0.46-75.ent.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-2009-1891
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2412
http://www.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is
details at https://www.redhat.com/security/team/contact/
Copyright 2009 Red Hat, Inc.
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