Apple has shipped a new batch of security updates for Intel, PowerPC, Mac and OS X Server systems.

The latest security patch - Security Update-2007-007 - is available for both Mac OS X 10.3.9 and OS 10.4.10 systems. It is recommended for all Mac users.

The update improves security across several components of the operating system including bzip2, CFNetwork, Core Audio, cscope, gnuzip, Kerberos, mDNSResponder, PDFKit, PHP, Quartz Composer, samba, WebKit and WebCore.

Among other patches, the update repairs a flaw which could let attackers on the same network cause a denial of service or arbitrary code execution using iChat.

The update also repairs a vulnerability in Samba, in which when Windows file sharing is enabled, an unauthenticated remote attacker may cause an unexpected application termination or arbitrary code execution.

The patch also fixes widely-reported flaws in which a website could contain malicious code that could lead to cross-site scripting or data theft.

Security Update 2007-006 has been incorporated into this security update.

All breeds of the current security update are available using Software Update or for direct download from Apple's website.