ZDI-10-061: Sun Java Runtime CMM readMabCurveData Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-061 
April 5, 2010

-- CVE ID:
CVE-2010-0838

-- Affected Vendors:
Sun Microsystems

-- Affected Products:
Sun Microsystems Java Runtime

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Sun's Java Runtime. 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.

-- Vendor Response:
Sun Microsystems has issued an update to correct this vulnerability. More
details can be found at:

http://www.oracle.com/technology/deploy/security/critical-patch-updates/javacpumar2010.html 

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

-- Credit:
This vulnerability was discovered by:
* Stephen Fewer of Harmony Security (www.harmonysecurity.com) 

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents 
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com 

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

http://www.zerodayinitiative.com/advisories/disclosure_policy/ 

Follow the ZDI on Twitter:

http://twitter.com/thezdi