USN-882-1: PHP vulnerabilities

Ubuntu Security Notice USN-882-1

13th January, 2010

php5 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 9.10
  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software description

  • php5


Maksymilian Arciemowicz discovered that PHP did not properly handle the
ini_restore function. An attacker could exploit this issue to obtain
random memory contents or to cause the PHP server to crash, resulting in a
denial of service. (CVE-2009-2626)

It was discovered that the htmlspecialchars function did not properly
handle certain character sequences, which could result in browsers becoming
vulnerable to cross-site scripting attacks when processing the output. With
cross-site scripting vulnerabilities, if a user were tricked into viewing
server output during a crafted server request, a remote attacker could
exploit this to modify the contents, or steal confidential data (such as
passwords), within the same domain. (CVE-2009-4142)

Stefan Esser discovered that PHP did not properly handle session data. An
attacker could exploit this issue to bypass safe_mode or open_basedir
restrictions. (CVE-2009-4143)

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 9.10:
php5-cli 5.2.10.dfsg.1-2ubuntu6.4
php5-cgi 5.2.10.dfsg.1-2ubuntu6.4
Ubuntu 9.04:
php5-cli 5.2.6.dfsg.1-3ubuntu4.5
php5-cgi 5.2.6.dfsg.1-3ubuntu4.5
Ubuntu 8.10:
php5-cli 5.2.6-2ubuntu4.6
php5-cgi 5.2.6-2ubuntu4.6
Ubuntu 8.04 LTS:
php5-cli 5.2.4-2ubuntu5.10
php5-cgi 5.2.4-2ubuntu5.10
Ubuntu 6.06 LTS:
php5-cli 5.1.2-1ubuntu3.18
php5-cgi 5.1.2-1ubuntu3.18

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the
necessary changes.


CVE-2009-2626, CVE-2009-4142, CVE-2009-4143