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USN-761-1: PHP vulnerabilities

20 April 2009

PHP vulnerabilities




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.

Update instructions

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

Ubuntu 8.10
Ubuntu 8.04
Ubuntu 6.06

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

Related notices

  • USN-761-2: php5-cgi, libapache2-mod-php5, php5-cli, php5