A JPEG, a Race, and a Ghost: Breaking Discourse's Image Pipeline

www.slcyber.io

cross-posted to:
netsec

A JPEG, a Race, and a Ghost: Breaking Discourse's Image Pipeline

www.slcyber.io

digicat@infosec.pubM to

blueteamsec@infosec.pubEnglish · 28 days ago

cross-posted to:
netsec

We discovered an arbitrary file read vulnerability in Discourse's image pipeline by chaining a JPEG race condition with ImageMagick and Ghostscript.

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