Ubuntu Security Notice USN-261-1
10th March, 2006
php4, php5 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 5.10
- Ubuntu 5.04
- Ubuntu 4.10
Details
Stefan Esser discovered that the 'session' module did not sufficiently
verify the validity of the user-supplied session ID. A remote attacker
could exploit this to insert arbitrary HTTP headers into the response
sent by the PHP application, which could lead to HTTP Response
Splitting (forging of arbitrary responses on behalf the PHP
application) and Cross Site Scripting (XSS) (execution of arbitrary
web script code in the client's browser) attacks. (CVE-2006-0207)
PHP applications were also vulnerable to several Cross Site Scripting
(XSS) flaws if the options 'display_errors' and 'html_errors' were
enabled. Please note that enabling 'html_errors' is not recommended
for production systems. (CVE-2006-0208)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 5.10:
- libapache2-mod-php4
- libapache2-mod-php5
- Ubuntu 5.04:
- libapache2-mod-php4
- libapache2-mod-php5
- Ubuntu 4.10:
- libapache2-mod-php4
- libapache2-mod-php5
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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