Quickpost: /JBIG2Decode Trigger Trio

Sometimes a piece of malware can execute without even opening the file. As this is the case with the /JBIG2Decode vulnerability in PDF documents, I took the time to produce a short video showing 3 ways the vulnerability can trigger without even opening the PDF document.

The first 2 demos use a “classic” /JBIG2Decode PDF exploit, the third demo uses a new PoC /JBIG2Decode PDF exploit I developed. This PDF document has a malformed /JBIG2Decode stream object in the metadata instead of the page. All PDF documents used have just a malformed /JBIG2Decode stream object, they don’t include a payload (shellcode), neither a JavaScript heap spray.
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