USN-761-2: PHP vulnerabilities
27 April 2009
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 9.04
USN-761-1 fixed vulnerabilities in PHP. This update provides the corresponding updates for Ubuntu 9.04.
Original advisory 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 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)
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 9.04
- libapache2-mod-php5 - 5.2.6.dfsg.1-3ubuntu4.1
- php5-cgi - 5.2.6.dfsg.1-3ubuntu4.1
- php5-cli - 5.2.6.dfsg.1-3ubuntu4.1
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.