Advisory Details

December 21st, 2012

Oracle Java WebStart Changing System Properties Remote Code Execution Vulnerability

ZDI-12-189
ZDI-CAN-1501

CVE ID CVE-2012-1721
CVSS SCORE 9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)
AFFECTED VENDORS Oracle
AFFECTED PRODUCTS Java Runtime
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Oracle Java. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists because it is possible to change system properties through trusted JNLP files. If a JNLP file requests "<all-permissions/>" and only references signed, trusted JAR files, it can set all System properties. By referencing a trusted JNLP file from an untrusted one it is possible to change System Properties that can lead to remote code execution under the context of the current user.

ADDITIONAL DETAILS Oracle has issued an update to correct this vulnerability. More details can be found at:
http://www.oracle.com/technetwork/topics/security/javacpujun2012-1515912.html
DISCLOSURE TIMELINE
  • 2012-03-14 - Vulnerability reported to vendor
  • 2012-12-21 - Coordinated public release of advisory
CREDIT Chris Ries
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