GHSA-74R2-7FF9-MJJ2 Pillow: Quadratic GIF comment concatenation allows DoS in Image.open()

============================================================================ Quadratic GIF comment concatenation allows DoS in Image.open Location: src/PIL/GifImagePlugin.py:266 in GifImageFile.seek Commit: a707c6b21c313880d0771e54965d142dd42358b6...