Apple releases iPhone 2.1 Software Update

Apple today released iPhone 2.1 Software Update.

iPhone version 2.1 contains many bug fixes and improvements, including the following:

• decrease in call set-up failures and call drops
• significantly improved battery life for most users
• dramatically reduced time to backup to iTunes
• improved email reliability, notably fetching email fro POP and Exchange accounts
• faster installation of 3rd part applications
• fixed bugs causing hangs and crashes if you have lots of 3rd party applications
• improved performance in text messaging
• faster loading and searching of contacts
• improved accuracy of the 3G signal strength display
• repeat alert up to two additional times for incoming text messages
• optiuon to wipe data after ten failed passcode attempts
• Genius playlist creation

About the security content of iPhone v2.1:

• Application Sandbox
CVE-ID: CVE-2008-3631
Available for: iPhone v2.0 through v2.0.2

Impact: An application may be able to read another application’s files

Description: The Application Sandbox does not properly enforce access restrictions between third-party applications. This may allow a third-party application to read files in another third-party application’s sandbox, and lead to the disclosure of sensitive information. This update addresses the issue by enforcing the proper access restrictions between application sandboxes. Credit to Nicolas Seriot of Sen:te and Bryce Cogswell for reporting this issue. This issue does not affect iPhone versions prior to v2.0.

• CoreGraphics
CVE-ID: CVE-2008-1806, CVE-2008-1807, CVE-2008-1808
Available for: iPhone v1.0 through v2.0.2

Impact: Multiple vulnerabilities in FreeType v2.3.5

Description: Multiple vulnerabilities exist in FreeType v2.3.5, the most serious of which may lead to arbitrary code execution when accessing maliciously crafted font data. This update addresses the issue by incorporating the security fixes from version 2.3.6 of FreeType. Further information is available via the FreeType site at http://www.freetype.org/

• mDNSResponder
CVE-ID: CVE-2008-1447
Available for: iPhone v1.0 through v2.0.2

Impact: mDNSResponder is susceptible to DNS cache poisoning and may return forged information

Description: mDNSResponder provides translation between host names and IP addresses for applications that use its unicast DNS resolution API. A weakness in the DNS protocol may allow a remote attacker to perform DNS cache poisoning attacks. As a result, applications that rely on mDNSResponder for DNS may receive forged information. This update addresses the issue by implementing source port and transaction ID randomization to improve resilience against cache poisoning attacks. Credit to Dan Kaminsky of IOActive for reporting this issue.

• Networking
CVE-ID: CVE-2008-3612
Available for: iPhone v2.0 through v2.0.2

Impact: Predictable TCP initial sequence numbers generation may lead to TCP spoofing or session hijacking

Description: TCP initial sequence numbers are sequentially generated. Predictable initial sequence numbers may allow a remote attacker to create a spoofed TCP connection or insert data into an existing TCP connection. This update addresses the issue by generating random TCP initial sequence numbers. This issue does not affect iPhone versions prior to v2.0.

• Passcode Lock
CVE-ID: CVE-2008-3633
Available for: iPhone v2.0 through v2.0.2

Impact: An unauthorized user may bypass the Passcode Lock and launch iPhone applications

Description: The Passcode Lock feature is designed to prevent applications from being launched unless the correct passcode is entered. An implementation issue in the handling of emergency calls allows users with physical access to an iPhone to launch an application without the passcode by double clicking the home button in emergency call. This update addresses the issue through improved handling of emergency calls. Credit to Matthew Yohe of The University of Iowa’s Department of Electrical and Computer Engineering for reporting this issue. This issue does not affect iPhone versions prior to v2.0.

• WebKit
CVE-ID: CVE-2008-3632
Available for: iPhone v1.0 through v2.0.2

Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution

Description: A use-after-free issue exists in WebKit’s handling of CSS import statements. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This update addresses the issue through improved handling of document references.

The update is available via iTunes. Simply choose your iPhone in the “Devices” list and click the “Update” button in the “Summary” tab.