Ubuntu 8.04 LTS / 10.04 LTS / 10.10 / 11.04 / 11.10 : php5 vulnerabilities (USN-1358-1)

Ubuntu Security Notice (C) 2012-2014 Canonical, Inc. / NASL script (C) 2012-2014 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related patches.

Description :

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 a 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).

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 6.5
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 57888 ()

Bugtraq ID: 46928
51417
51806
51830

CVE ID: CVE-2011-0441
CVE-2011-4153
CVE-2011-4885
CVE-2012-0057
CVE-2012-0788
CVE-2012-0830
CVE-2012-0831