Apple has released a new firmware upgrade to combat a sms bug that could leave your iphone vunerable for attack.
Read the following for further info:
Apple’s Info about 3.0.1 Upgrade
This document describes the security content of iPhone OS 3.0.1.
For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website.
For information about the Apple Product Security PGP Key, see “How to use the Apple Product Security PGP Key.”
Where possible, CVE IDs are used to reference the vulnerabilities for further information.
To learn about other Security Updates, see “Apple Security Updates.”
iPhone, Product Security
iPhone OS 3.0.1
Available for: iPhone OS 1.0 through iPhone OS 3.0
Impact: Receiving a maliciously crafted SMS message may lead to an unexpected service interruption or arbitrary code execution
Description: A memory corruption issue exists in the decoding of SMS messages. Receiving a maliciously crafted SMS message may lead to an unexpected service interruption or arbitrary code execution. This update addresses the issue through improved error handling. Credit to Charlie Miller of Independent Security Evaluators, and Collin Mulliner of Technical University Berlin for reporting this issue.