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 a function responsible for creating a JPEG image encoder. The function makes an invalid assignment based on the value of the num_components element of a comp_info structure while parsing a JPEG file. It then improperly uses the original value while performing memory copy operations. By specifying certain values as the num_components field this can be exploited to gain arbitrary code execution by overflowing an undersized buffer on the heap.
