In Xpdf 4.01.01, a heap-based buffer overflow could be triggered in DCTStream::decodeImage() in when writing to frameBuf memory. It can, for example, be triggered by sending a crafted PDF document to the pdftotext tool. It allows an attacker to use a crafted pdf file to cause Denial of Service, an information leak, or possibly unspecified other impact.

Source: CVE-2019-13281

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