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TPTI-12-01 : Oracle Java True Type Font IDEF Opcode Parsing Remote
Code Execution Vulnerability
http://dvlabs.tippingpoint.com/advisory/TPTI-12-01
February 22, 2012
– CVE ID:
– CVSS:
9, AV:N/AC:L/Au:N/C:P/I:P/A:C
– Affected Vendors:
Oracle
Oracle Java Runtime
The specific flaw exists within the way Java handles True Type Font
files. When reading a font file, Java will use the MaxInstructionSize
from the maxp table to create a heap memory location to store all the
Instruction Definition found in the Font Program 'fpgm' table.
However, when Java encounters an IDEF opcode (0x89) in the opcode
stream it never checks the size of the MaxInstructionSize which can
result in a heap buffer overflow. This can lead to remote code
execution under the context of the current process.
Oracle has issued an update to correct this vulnerability. More
details can be found at:
http://www.oracle.com/technetwork/topics/security/javacpufeb2012-366318.html
2012-02-22 - Coordinated public release of advisory
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