Ubuntu 1358-2: PHP regression

    Date13 Feb 2012
    CategoryUbuntu
    59
    Posted ByLinuxSecurity Advisories
    USN 1358-1 introduced a regression in PHP.
    ==========================================================================
    Ubuntu Security Notice USN-1358-2
    February 13, 2012
    
    php5 regression
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 11.10
    - Ubuntu 11.04
    - Ubuntu 10.10
    - Ubuntu 10.04 LTS
    - Ubuntu 8.04 LTS
    
    Summary:
    
    USN 1358-1 introduced a regression in PHP.
    
    Software Description:
    - php5: HTML-embedded scripting language interpreter
    
    Details:
    
    USN 1358-1 fixed multiple vulnerabilities in PHP. The fix for
    CVE-2012-0831 introduced a regression where the state of the
    magic_quotes_gpc setting was not correctly reflected when calling
    the ini_get() function.
    
    We apologize for the inconvenience.
    
    Original advisory details:
    
     It was discovered that PHP computed hash values for form parameters
     without restricting the ability to trigger hash collisions predictably.
     This could allow a remote attacker to cause a denial of service by
     sending many crafted parameters. (CVE-2011-4885)
     
     ATTENTION: this update changes previous PHP behavior by
     limiting the number of external input variables to 1000.
     This may be increased by adding a "max_input_vars"
     directive to the php.ini configuration file. See
     http://www.php.net/manual/en/info.configuration.php#ini.max-input-vars
     for more information.
     
     Stefan Esser discovered that the fix to address the predictable hash
     collision issue, CVE-2011-4885, did not properly handle the situation
     where the limit was reached. This could allow a remote attacker to
     cause a denial of service or execute arbitrary code via a request
     containing a large number of variables. (CVE-2012-0830)
     
     It was discovered that PHP did not always check the return value of
     the zend_strndup function. This could allow a remote attacker to
     cause a denial of service. (CVE-2011-4153)
     
     It was discovered that PHP did not properly enforce libxslt security
     settings. This could allow a remote attacker to create arbitrary
     files via a crafted XSLT stylesheet that uses the libxslt output
     extension. (CVE-2012-0057)
     
     It was discovered that PHP did not properly enforce that PDORow
     objects could not be serialized and not be saved in a session. A
     remote attacker could use this to cause a denial of service via an
     application crash. (CVE-2012-0788)
     
     It was discovered that PHP allowed the magic_quotes_gpc setting to
     be disabled remotely. This could allow a remote attacker to bypass
     restrictions that could prevent an SQL injection. (CVE-2012-0831)
     
     USN 1126-1 addressed an issue where the /etc/cron.d/php5 cron job
     for PHP allowed local users to delete arbitrary files via a symlink
     attack on a directory under /var/lib/php5/. Emese Revfy discovered
     that the fix had not been applied to PHP for Ubuntu 10.04 LTS. This
     update corrects the issue. We apologize for the error. (CVE-2011-0441)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 11.10:
      libapache2-mod-php5             5.3.6-13ubuntu3.6
      php5                            5.3.6-13ubuntu3.6
      php5-cgi                        5.3.6-13ubuntu3.6
      php5-cli                        5.3.6-13ubuntu3.6
    
    Ubuntu 11.04:
      libapache2-mod-php5             5.3.5-1ubuntu7.7
      php5                            5.3.5-1ubuntu7.7
      php5-cgi                        5.3.5-1ubuntu7.7
      php5-cli                        5.3.5-1ubuntu7.7
    
    Ubuntu 10.10:
      libapache2-mod-php5             5.3.3-1ubuntu9.10
      php5                            5.3.3-1ubuntu9.10
      php5-cgi                        5.3.3-1ubuntu9.10
      php5-cli                        5.3.3-1ubuntu9.10
    
    Ubuntu 10.04 LTS:
      libapache2-mod-php5             5.3.2-1ubuntu4.14
      php5                            5.3.2-1ubuntu4.14
      php5-cgi                        5.3.2-1ubuntu4.14
      php5-cli                        5.3.2-1ubuntu4.14
    
    Ubuntu 8.04 LTS:
      libapache2-mod-php5             5.2.4-2ubuntu5.23
      php5                            5.2.4-2ubuntu5.23
      php5-cgi                        5.2.4-2ubuntu5.23
      php5-cli                        5.2.4-2ubuntu5.23
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1358-2
      http://www.ubuntu.com/usn/usn-1358-1
      https://launchpad.net/bugs/930115
    
    Package Information:
      https://launchpad.net/ubuntu/+source/php5/5.3.6-13ubuntu3.6
      https://launchpad.net/ubuntu/+source/php5/5.3.5-1ubuntu7.7
      https://launchpad.net/ubuntu/+source/php5/5.3.3-1ubuntu9.10
      https://launchpad.net/ubuntu/+source/php5/5.3.2-1ubuntu4.14
      https://launchpad.net/ubuntu/+source/php5/5.2.4-2ubuntu5.23
    
    
    You are not authorised to post comments.

    Comments powered by CComment

    LinuxSecurity Poll

    What do you think of the articles on LinuxSecurity?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/24-what-do-you-think-of-the-quality-of-the-articles-on-linuxsecurity?task=poll.vote&format=json
    24
    radio
    [{"id":"87","title":"Excellent, don't change a thing!","votes":"23","type":"x","order":"1","pct":53.49,"resources":[]},{"id":"88","title":"Should be more technical","votes":"5","type":"x","order":"2","pct":11.63,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"15","type":"x","order":"3","pct":34.88,"resources":[]}]["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"]["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"]350
    bottom200

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.