Swftools null pointer dereference vulnerability (CNVD-2022-62216)

Swftools is a set of utilities for working with Adobe Flash files (SWF files). swftools 2020-12-22 and earlier versions are vulnerable to a null pointer dereference, which stems from a NULL pointer dereference in the function swf_DeleteFilter() located in swffilter.c. An attacker could exploit this vulnerability to enable a denial-of-service attack.