Shadow Attacks Let Attackers Replace Content in Digitally Signed PDFs

Discussion in 'News Aggregator' started by Ravie Lakshmanan, 23 Feb 2021.

  1. Researchers have demonstrated a novel class of attacks that could allow a bad actor to potentially circumvent existing countermeasures and break the integrity protection of digitally signed PDF documents. Called "Shadow attacks" by academics from Ruhr-University Bochum, the technique uses the "enormous flexibility provided by the PDF specification so that shadow documents remain[​IMG]

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