USN-761-1: PHP vulnerabilities
20 April 2009
php5 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 8.10
- Ubuntu 8.04 LTS
- Ubuntu 6.06 LTS
Software Description
- php5
Details
It was discovered that PHP did not sanitize certain error messages when display_errors is enabled, 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-2008-5814)
It was discovered that PHP did not properly handle the mbstring.func_overload setting within .htaccess files when using virtual hosts. A virtual host administrator could use this flaw to cause settings to be applied to other virtual hosts on the same server. (CVE-2009-0754)
It was discovered that PHP did not properly handle certain malformed strings when being parsed by the json_decode function. A remote attacker could exploit this flaw and cause the PHP server to crash, resulting in a denial of service. This issue only affected Ubuntu 8.04 and 8.10. (CVE-2009-1271)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 8.10
- libapache2-mod-php5 - 5.2.6-2ubuntu4.2
- php5-cgi - 5.2.6-2ubuntu4.2
- php5-cli - 5.2.6-2ubuntu4.2
- Ubuntu 8.04 LTS
- libapache2-mod-php5 - 5.2.4-2ubuntu5.6
- php5-cgi - 5.2.4-2ubuntu5.6
- php5-cli - 5.2.4-2ubuntu5.6
- Ubuntu 6.06 LTS
- libapache2-mod-php5 - 5.1.2-1ubuntu3.14
- php5-cgi - 5.1.2-1ubuntu3.14
- php5-cli - 5.1.2-1ubuntu3.14
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the necessary changes.