‘Sun Java Runtime CMM readMabCurveData Code Execution Vulnerability’


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Sun’s Java Runtime.’


‘The information has been provided by Stephen Fewer.
The original article can be found at: http://www.zerodayinitiative.com/advisories/ZDI-10-061/


Vulnerable Systems:
 * Sun Microsystems Java Runtime Environment (JRE)

User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists within the CMM module of the Sun JVM. This module contains a function readMabCurveData. An applet can indirectly call this function and provide it with a malicious curv object. The function trusts the size of the curv element implicitly and copies the data into a fixed-length stack buffer. Exploitation of this issue can lead to arbitrary code execution under the context of the user invoking the applet.

Patch Availability:
Sun Microsystems has issued an update to correct this vulnerability. More details can be found at:

CVE Information:

Disclosure Timeline:
2009-11-09 – Vulnerability reported to vendor
2010-04-05 – Coordinated public release of advisory’

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