PDFResurrect before 0.20 lack of header validation checks causes heap-buffer-overflow in pdf_get_version().
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZOIEVFM3SIMAEOFJKKMYH2TLZ7PXLSUD/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JMEEEPBBGER5LPABBRVZLMCC6Z24RBXW/
https://github.com/enferex/pdfresurrect/commit/1b422459f07353adce2878806d5247d9e91fb397
https://github.com/enferex/pdfresurrect/issues/14
https://lists.debian.org/debian-lts-announce/2020/12/msg00002.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20740