Description
pillow_heif is a Python library for working with HEIF images and plugin for Pillow. Prior to version 1.3.0, an integer overflow in the encode path buffer validation of `_pillow_heif.c` allows an attacker to bypass bounds checks by providing large image dimensions, resulting in a heap out-of-bounds read. This can lead to information disclosure (server heap memory leaking into encoded images) or denial of service (process crash). No special configuration is required — this triggers under default settings. Version 1.3.0 fixes the issue.
Problem types
CWE-190: Integer Overflow or Wraparound
Product status
References
github.com/...w_heif/security/advisories/GHSA-5gjj-6r7v-ph3x
github.com/...ommit/8305a15d3780c533b762578cbe987d27a2c59c7a
github.com/bigcat88/pillow_heif/releases/tag/v1.3.0