Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Added GIF decompression bomb check #6402

Merged
merged 1 commit into from Jun 30, 2022
Merged

Added GIF decompression bomb check #6402

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
Binary file added Tests/images/decompression_bomb_extents.gif
View file
Open in desktop
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
5 changes: 5 additions & 0 deletions Tests/test_decompression_bomb.py
View file
Open in desktop
Expand Up @@ -61,6 +61,11 @@ def test_exception_gif(self):
with Image.open("Tests/images/decompression_bomb.gif"):
pass

def test_exception_gif_extents(self):
with Image.open("Tests/images/decompression_bomb_extents.gif") as im:
with pytest.raises(Image.DecompressionBombError):
im.seek(1)

def test_exception_bmp(self):
with pytest.raises(Image.DecompressionBombError):
with Image.open("Tests/images/bmp/b/reallybig.bmp"):
Expand Down
1 change: 1 addition & 0 deletions src/PIL/GifImagePlugin.py
View file
Open in desktop
Expand Up @@ -265,6 +265,7 @@ def _seek(self, frame, update_image=True):
x1, y1 = x0 + i16(s, 4), y0 + i16(s, 6)
if (x1 > self.size[0] or y1 > self.size[1]) and update_image:
self._size = max(x1, self.size[0]), max(y1, self.size[1])
Image._decompression_bomb_check(self._size)
frame_dispose_extent = x0, y0, x1, y1
flags = s[8]

Expand Down