About the security content of Security Update 2008-004 and Mac OS X 10.5.4

This document describes the security content of Security Update 2008-004 and Mac OS X 10.5.4, which can be downloaded and installed via Software Update preferences, or from Apple Downloads.

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 find out 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 find out more about other Security Updates, see "Apple Security Updates".

Security Update 2008-004 and Mac OS X v10.5.4

Alias Manager

CVE-ID: CVE-2008-2308

Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11

Impact: Resolving an alias containing maliciously crafted volume mount information may lead to an unexpected application termination or arbitrary code execution.

Description: A memory corruption issue exists in the handling of AFP volume mount information in an alias data structure. Resolving an alias containing maliciously crafted volume mount information may lead to an unexpected application termination or arbitrary code execution. This update addresses the issue by performing additional validation of alias data structures. This issue only affects Intel-based systems running Mac OS X 10.5.1 or earlier.

CoreTypes

CVE-ID: CVE-2008-2309

Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5 to v10.5.3, Mac OS X Server v10.5 to v10.5.3

Impact: Users are not warned before opening certain potentially unsafe content types.

Description: This update adds .xht and .xhtm files to the system's list of content types that will be flagged as potentially unsafe under certain circumstances, such as when they have been downloaded from a web page. While these content types are not launched automatically, if opened manually they could lead to the execution of a malicious payload. This update improves the system's ability to notify users before handling .xht and .xhtm files. On Mac OS X v10.4 this functionality is provided by the Download Validation feature. On Mac OS X v10.5 this functionality is provided by the Quarantine feature. Credit to Brian Mastenbrook for reporting this issue.

c++filt

CVE-ID: CVE-2008-2310

Available for: Mac OS X v10.5 to v10.5.3, Mac OS X Server v10.5 to v10.5.3

Impact: Passing a maliciously crafted string to c++filt may lead to an unexpected application termination or arbitrary code execution.

Description: A format string issue exists in c++filt, which is a debugging tool used to demangle C++ and Java symbols. Passing a maliciously crafted string to c++filt may lead to an unexpected application termination or arbitrary code execution. This update addresses the issue through improved handling of format strings. This issue does not affect systems prior to Mac OS X 10.5.

Dock

CVE-ID: CVE-2008-2314

Available for: Mac OS X v10.5 to v10.5.3, Mac OS X Server v10.5 to v10.5.3

Impact: A person with physical access may be able to bypass the screen lock.

Description: When the system is set to require a password to wake from sleep or a screensaver, and Exposé hot corners have been set, a person with physical access may be able to access the system without entering a password. This update addresses the issue by disabling hot corners when the screen lock is active. This issue does not affect systems prior to Mac OS X 10.5. Credit to Andrew Cassell of Marine Spill Response Corporation for reporting this issue.

Launch Services

CVE-ID: CVE-2008-2311

Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11

Impact: Visiting a maliciously crafted website may lead to arbitrary code execution.

Description: A race condition exists in the download validation of symbolic links when the target of the link changes during the narrow time window of validation. If the "Open 'safe' files" preference has been enabled in Safari, visiting a maliciously crafted website may cause a file to be opened on the user's system, resulting in arbitrary code execution. This update addresses the issue by performing additional validation of downloaded files. This issue does not affect systems running Mac OS X 10.5 or later.

Net-SNMP

CVE-ID: CVE-2008-0960

Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5 to v10.5.3, Mac OS X Server v10.5 to v10.5.3

Impact: A remote attacker may be able to spoof an authenticated SNMPv3 packet.

Description: An issue exists in Net-SNMP's SNMPv3 authentication, which may allow maliciously crafted packets to bypass the authentication check. This update addresses the issue by performing additional validation of SNMPv3 packets. Additional information is available here: http://www.kb.cert.org/vuls/id/878044

Ruby

CVE-ID: CVE-2008-2662, CVE-2008-2663, CVE-2008-2664, CVE-2008-2725, CVE-2008-2726

Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5 to v10.5.3, Mac OS X Server v10.5 to v10.5.3

Impact: Running a Ruby script that uses untrusted input to access strings or arrays may lead to an unexpected application termination or arbitrary code execution.

Description: Multiple memory corruption issues exist in Ruby's handling of strings and arrays, the most serious of which may lead to arbitrary code execution. This update addresses the issue by performing additional validation of strings and arrays.

Ruby

CVE-ID: CVE-2008-1145

Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5 to v10.5.3, Mac OS X Server v10.5 to v10.5.3

Impact: If WEBRick is running, a remote attacker may be able to access files protected by WEBrick's :NondisclosureName option.

Description: The :NondisclosureName option in the Ruby WEBrick toolkit is used to restrict access to files. Requesting a file name that uses unexpected capitalisation may bypass the :NondisclosureName restriction. This update addresses the issue by additional validation of file names. Additional information is available at http://www.ruby-lang.org/en/news/2008/03/03/webrick-file-access-vulnerability/. The directory traversal issue described in the advisory does not affect Mac OS X.

SMB File Server

CVE-ID: CVE-2008-1105

Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5 to v10.5.3, Mac OS X Server v10.5 to v10.5.3

Impact: A remote attacker may be able to cause an unexpected application termination or arbitrary code execution.

Description: A heap buffer overflow exists in the handling of SMB packets. Sending malicious SMB packets to a SMB server, or connecting to a malicious SMB server, may lead to an unexpected application termination or arbitrary code execution. This update addresses the issue through improved bounds checking on the length of received SMB packets. Credit to Alin Rad Pop of Secunia Research for reporting this issue.

System Configuration

CVE-ID: CVE-2008-2313

Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11

Impact: A local user may be able to execute arbitrary code with the privileges of new users.

Description: A local user may be able to populate the User Template directory with files that will become part of the home directory when a new user is created. This could allow arbitrary code execution with the privileges of the new user. This update addresses the issue by applying more restrictive permissions on the User Template directory. This issue does not affect systems running Mac OS X 10.5 or later. Credit to Andrew Mortensen of the University of Michigan for reporting this issue.

Tomcat

CVE-ID: CVE-2005-3164, CVE-2007-1355, CVE-2007-2449, CVE-2007-2450, CVE-2007-3382, CVE-2007-3383, CVE-2007-5333, CVE-2007-3385, CVE-2007-5461

Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11

Impact: Multiple vulnerabilities in Tomcat 4.1.36

Description: Tomcat version 4.x is bundled on Mac OS X v10.4.11 systems. Tomcat on Mac OS X v10.4.11 is updated to version 4.1.37 to address several vulnerabilities, the most serious of which may lead to a cross-site scripting attack. Further information is available on the Tomcat site here: http://tomcat.apache.org/. Tomcat version 6.x is bundled with Mac OS X v10.5 systems.

VPN

CVE-ID: CVE-2007-6276

Available for: Mac OS X v10.5 to v10.5.3, Mac OS X Server v10.5 to v10.5.3

Impact: Remote attackers may be able to cause an unexpected application termination.

Description: A divide by zero issue exists in the virtual private network daemon's handling of load balancing information. Processing a maliciously crafted UDP packet may lead to an unexpected application termination. This issue does not lead to arbitrary code execution. This update addresses the issue by performing additional validation of load balancing information. This issue does not affect systems prior to Mac OS X 10.5.

WebKit

CVE-ID: CVE-2008-2307

Available for: Mac OS X v10.5 to v10.5.3, Mac OS X Server v10.5 to v10.5.3

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

Description: A memory corruption issue exists in WebKit's handling of JavaScript arrays. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This update addresses the issue through improved bounds checking. Along with this fix, the version of Safari for Mac OS X v10.5.4 is updated to 3.1.2. For Mac OS X v10.4.11 and Windows XP/Vista, this issue is addressed in Safari v3.1.2 for those systems. Credit to James Urquhart for reporting this issue.