Note: This is an archival copy of Security Sun Alert 244987 as previously published on http://sunsolve.sun.com.|
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1019737.1.
6726779, 6733336, 6751322, 6766136
Date of Resolved Release
Java Runtime Environment (JRE) Buffer Overflow Vulnerabilities in Processing Image Files and Fonts May Allow Applets or Java Web Start Applications to Elevate Their Privileges
Multiple buffer overflow vulnerabilities in the Java Runtime Environment (JRE) image processing code (CR 6726779), its handling of GIF images (CR 6766136) as well as its font processing (CRs 6733336 and 6751322) may allow an untrusted applet or Java Web Start application to elevate its privileges. For example, an untrusted applet may grant itself permissions to read and write local files or execute local applications that are accessible to the user running the untrusted applet.
Sun acknowledges with thanks, the following:
For CR 6726779:
An anonymous researcher working with Zero Day Initiative (http://www.zerodayinitiative.com/) and TippingPoint (http://www.tippingpoint.com)For CR 6733336:
Sebastian Apelt working with iDefense VCP http://labs.idefense.com/vcp/For CR 6751322 and CR 6766136:
iDefense VCP http://labs.idefense.com/vcp/2. Contributing Factors
For CR 6726779 and CR 6733336, these issues can occur in the following Java SE and Java SE for Business releases for Solaris, Windows, and Linux:
For CR 6766136, this issue can occur in the following Java SE and Java SE for Business releases for Solaris, Windows, and Linux:
To determine the default version of the JRE that Internet Explorer uses:
To determine the default version of the JRE that Mozilla or Firefox browsers use, visit the URL "about:plugins".
The browser will display a page called "Installed plug-ins" which lists the version of the Java Plug-in as in the following example:
Java(TM) Plug-in 1.5.0_11-b03
(Indicating that the version of the JRE that the browser uses is 1.5.0_11).
There are no predictable symptoms that would indicate the described issues have been exploited.
There are no workarounds for these issues. Please see the Resolution section below.
The issues for CR 6726779 and CR 6733336 are addressed in the following Java SE and Java SE for Business releases for Solaris, Windows, and Linux:
JDK 6 Update 11:
JRE 6 Update 11:
and through the Java Update tool for Microsoft Windows users.
JDK 6 Update 11 for Solaris is available in the following patches:
JDK 5.0 Update 17 for Solaris is available in the following patches:
Java SE for Business releases are available at:
Java SE releases SDK and JRE 1.4.2 have completed the Sun End of Service Life (EOSL) process. Sun recommends that users upgrade to the latest Java SE release. Customers interested in continuing to receive critical fixes on SDK and JRE 1.4.2 are encouraged to migrate to Java SE for Business.
SDK and JRE 1.3.1 have completed the Sun End of Service Life (EOSL) process and is only supported for customers with Solaris 8 and Vintage Support Offering support contracts (see http://java.sun.com/j2se/1.3/download.html). Sun strongly recommends that users upgrade to the latest Java SE release.
Note: When installing a new version of the product from a source other than a Solaris patch, it is recommended that the old affected versions be removed from your system. To remove old affected versions on the Windows platform, please see:
For more information on Security Sun Alerts, see 1009886.1.
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Sun Java Standard Edition (Java SE)
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