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ESB-2009.1386.3 - UPDATE [Win][UNIX/Linux][Debian] python-django: Denial of service - Remote/unauthenticated

Date: 15 October 2009
Related Files: ESB-2009.1386   ESB-2009.1386.2  

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                              ESB-2009.1386.3
             New python-django packages fix denial of service
                              15 October 2009

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           python-django
Publisher:         Debian
Operating System:  Debian GNU/Linux 5
                   UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-3695  

Original Bulletin: 
   http://www.debian.org/security/2009/dsa-1905

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running python-django check for an updated version of the software 
         for their operating system.

Revision History:  October 15 2009: CVE reference added
                   October 12 2009: Comment added
                   October 12 2009: Initial Release

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- - --------------------------------------------------------------------------
Debian Security Advisory DSA-1905-1                    security@debian.org
http://www.debian.org/security/                                 Nico Golde
October 10th, 2009                      http://www.debian.org/security/faq
- - --------------------------------------------------------------------------

Package        : python-django
Vulnerability  : insufficient input validation
Problem type   : remote
Debian-specific: no
Debian bug     : #550457
CVE ID         : None yet

The forms library of python-django, a high-level Python web development
framework, is using a badly chosen regular expression when validating
email addresses and URLs.  An attacker can use this to perform denial
of service attacks (100% CPU consumption) due to bad backtracking
via a specially crafted email address or URL which is validated by the
django forms library.


python-django in the oldstable distribution (etch), is not affected by
this problem.

For the stable distribution (lenny), this problem has been fixed in
version 1.0.2-1+lenny2.

For the testing distribution (squeeze), this problem will be fixed soon.

For the unstable distribution (sid), this problem has been fixed in
version 1.1.1-1.


We recommend that you upgrade your python-django packages.

Upgrade instructions
- - --------------------

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 5.0 alias lenny
- - --------------------------------

Debian (stable)
- - ---------------

Stable updates are available for alpha, amd64, arm, armel, hppa, i386, ia64, mips, mipsel, powerpc, s390 and sparc.

Source archives:

  http://security.debian.org/pool/updates/main/p/python-django/python-django_1.0.2-1+lenny2.dsc
    Size/MD5 checksum:     1606 7d335038ed1c10264a8ae9089574397c
  http://security.debian.org/pool/updates/main/p/python-django/python-django_1.0.2.orig.tar.gz
    Size/MD5 checksum:  4649433 89353e3749668778f1370d2e444f3adc
  http://security.debian.org/pool/updates/main/p/python-django/python-django_1.0.2-1+lenny2.diff.gz
    Size/MD5 checksum:    15789 586cdeaa9d99dc74240a16d1c40803fb

Architecture independent packages:

  http://security.debian.org/pool/updates/main/p/python-django/python-django_1.0.2-1+lenny2_all.deb
    Size/MD5 checksum:  4706950 f01133963dbac73a87e9a209f85cb38d


  These files will probably be moved into the stable distribution on
  its next update.

- - ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
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which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
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information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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