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    Debian: DSA-1905-1: New python-django packages fix denial of service

    Date 10 Oct 2009
    171
    Posted By LinuxSecurity Advisories
    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
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    Debian Security Advisory DSA-1905-1                    This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                                 Nico Golde
    October 10th, 2009                      https://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:
    
      https://security.debian.org/pool/updates/main/p/python-django/python-django_1.0.2-1+lenny2.dsc
        Size/MD5 checksum:     1606 7d335038ed1c10264a8ae9089574397c
      https://security.debian.org/pool/updates/main/p/python-django/python-django_1.0.2.orig.tar.gz
        Size/MD5 checksum:  4649433 89353e3749668778f1370d2e444f3adc
      https://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:
    
      https://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 https://security.debian.org/ stable/updates main
    For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    Package info: `apt-cache show ' and https://packages.debian.org/
    

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