Denial of Service Vulnerability in Xpdf 4.00 via Large Loop in AcroForm.cc

CVE-2018-18651 · MEDIUM Severity

AV:N/AC:M/AU:N/C:N/I:N/A:P

An issue was discovered in Xpdf 4.00. catalog->getNumPages() in AcroForm.cc allows attackers to launch a denial of service (hang caused by large loop) via a specific pdf file, as demonstrated by pdftohtml. This is mainly caused by a large number after the /Count field in the file.

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