Multiple Security Vulnerabilities in the Solaris Tag Image File Format Library libtiff(3)

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Multiple Security Vulnerabilities in the Solaris Tag Image File Format Library libtiff(3)

1. Impact

Multiple security vulnerabilities in the Solaris Tag Image File Format library (libtiff(3)) may allow a local or remote unprivileged user to crash applications that dynamically link to the "libtiff" library and execute arbitrary code with the privileges of a local user. The ability to crash an application that links to the "libtiff" library is a type of Denial of Service (DoS). Solaris ships several applications as part of the GNOME Desktop Environment that dynamically link with the "libtiff" library.

These issues are described in the following documents:

CVE-2006-2024 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2024

CVE-2006-2025 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2025

CVE-2006-2026 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2026

Sun acknowledges with thanks, Tavis Ormandy from the Google Security Team for bringing these issues to our attention.

2. Contributing Factors

These issues can occur in the following releases:

SPARC Platform

• Solaris 8 without patch 139093-01
  
• Solaris 9 without patch 125673-01
• Solaris 10 without patch 119900-03

x86 Platform

• Solaris 8 without patch 139094-01
  
• Solaris 9 without patch 125674-01
• Solaris 10 without patch 119901-03

3. Symptoms

There are no predictable symptoms that would indicate these issues have been exploited to cause a Denial of Service or execute arbitrary code with the privileges of a local user.

4. Workaround

The stack overflow security issues referenced in this document may be worked around by using the "noexec_user_stack" option. This can be achieved by editing the "/etc/system" file and adding the following lines:

    set noexec_user_stack = 1
    set noexec_user_stack_log = 1

Note: A reboot will be necessary in order for this change to take effect. See system(4) for more information on modifying the "/etc/system" file.

To workaround the remaining issues described in this document, do not load images from untrusted sources.

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

• Solaris 8 with patch 139093-01 or later
  
• Solaris 9 with patch 125673-01 or later
• Solaris 10 with patch 119900-03 or later

x86 Platform

• Solaris 8 with patch 139094-01 or later
  
• Solaris 9 with patch 125674-01 or later
• Solaris 10 with patch 119901-03 or later

For more information on Security Sun Alerts, see Technical Instruction ID 213557.

This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements.

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Modification History

12-Nov-2007: Updated Impact section for corrected CVE references
29-Nov-2007: Updated Contributing Factors and Resolution sections
03-Sep-2008: Updated Contributing Factors and Resolution sections; now Resolved

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