Apple has issued three batches of software updates and fixes for its popular iPhone, Mac OS X operating system and the Safari 3.03 browser beta.

The iPhone fixes address a pair of Safari-related vulnerabilities that came up almost immediately after the phone's release, plus three more that were not disclosed.

A security firm called Independent Security Experts (ISE) first uncovered iPhone vulnerabilities last month and informed Apple of its findings. ISE planned to demonstrate what it found at the Black Hat security conference this week in Las Vegas.

Two of the fixes address cross-site scripting problems, one by preventing JavaScript in remote Web pages from modifying pages outside of their domain, the other by fixing an HTTP injection issue in XMLHttpRequest. Apple credited Richard Moore of Westpoint Ltd. for reporting the issue.

Apple credited the ISE crew for pointing out a heap buffer overflow problem in the Perl Compatible Regular Expressions (PCRE) library, while Apple thanked Tomohito Yoshino, of Business Architects, for reporting an error in the International Domain Name (IDN) that allows for fake URL addresses in fonts that contain look-alike characters.