As mentioned in this Secunia advisory today, rPath has release updates to several packages today including a few PHP ones and GD library updates.

rPath has issued an update for gd and multiple php packages. This fixes some vulnerabilities, where some have an unknown impact and others can potentially be exploited to cause a DoS (Denial of Service).

The update is marked as "moderately critical" so it's recommended that users update their installations as soon as possible. You can find out more information and get the links to download the packages from the original advisory post.

On Secunia.com, two new updates for the Debian linux distribution have been posted - on for PHP4 and the other for PHP5:

Debian has issued an update for php4/5. This fixes some vulnerabilities, which can be exploited by malicious people to conduct cross-site scripting attacks, cause a DoS (Denial of Service), and potentially compromise a vulnerable system.

You can get more information and links to the downloads here:

• PHP4 announcement
• PHP5 announcement

The Slackware group has released an update to their PHP5 packages according to this new release on the Secunia site:

Slackware has issued an update for php5. This fixes some vulnerabilities, where one has an unknown impact and others can be exploited by malicious people to bypass certain security restrictions and cause a DoS (Denial of Service).

You can grab the updated packages via the original advisory and bring your installation up to date with the latest security fixes.

Secunia has posted this new advisory today about an issue with the GD graphics library functionality in PHP that could be used to cause a Denial of Service via a truncated PNG image.

The vulnerability is caused due to the incorrect use of libpng within the function "gdPngReadData()" in ext/gd/libgd/gd_png.c of the GD extension when processing truncated data. This can be exploited to cause an infinite loop by e.g. tricking an application to process a specially crafted file. (reported by Xavier Roche)

This issue has been confirmed in PHP versions 4.4.7 and 5.2.2 but may affect others. The issue has already been corrected, however, and can be fetched from the PHP CVS system to protect your system.

Secunia has issued an advisory today for Ubuntu users - an upgrade has been released to correct a few vulnerabilities.

Ubuntu has issued an update for php. This fixes some vulnerabilities, which can be exploited by malicious users to disclose potentially sensitive information, bypass certain security restrictions, gain escalated privileges, cause a DoS (Denial of Service), compromise a vulnerable system, and by malicious people to disclose potentially sensitive information, bypass certain security restrictions, cause a DoS (Denial of Service), and potentially compromise a vulnerable system.

The Secunia post has links to all of the packages you'll need (for each kind of architecture) to get things up to date and corrected. This issue has been marked as "Moderately Critical".