USN-882-1: PHP vulnerabilities

13 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 versions:

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