PDF2JSON DCTStream::transformDataUnit Denial of Service Vulnerability (CNVD-2021-55955)

PDF2JSON is a conversion library based on XPDF (3.02) that can be used to convert PDF pages page by page to JSON and XML formats. PDF2JSON DCTStream::transformDataUnit suffers from a denial of service vulnerability. The vulnerability stems from an invalid read of size 4. An attacker could exploit this vulnerability to cause a denial of service.