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CVE-2007-4559 Patch #67

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CVE-2007-4559 Patch #67

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45 changes: 43 additions & 2 deletions hcpannot/interface.py
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Original file line number Diff line number Diff line change
Expand Up @@ -255,7 +255,29 @@ def load_subdata(sid, h, load_path=None, osf_url=None):
outpath = os.path.join(load_path, 'annot-images')
import tarfile
with tarfile.open(path) as fl:
fl.extractall(outpath)

import os

def is_within_directory(directory, target):

abs_directory = os.path.abspath(directory)
abs_target = os.path.abspath(target)

prefix = os.path.commonprefix([abs_directory, abs_target])

return prefix == abs_directory

def safe_extract(tar, path=".", members=None, *, numeric_owner=False):

for member in tar.getmembers():
member_path = os.path.join(path, member.name)
if not is_within_directory(path, member_path):
raise Exception("Attempted Path Traversal in Tar File")

tar.extractall(path, members, numeric_owner=numeric_owner)


safe_extract(fl, outpath)
# We can go ahead and delete that tarball after we have extracted it;
# it's just a temporary file anyway.
os.remove(path)
Expand Down Expand Up @@ -345,7 +367,26 @@ def prep_legends(load_path=None, osf_url=None):
path = pp.local_path('annot-images', 'legends.tar.gz')
import tarfile
with tarfile.open(path) as fl:
fl.extractall(load_path)
def is_within_directory(directory, target):

abs_directory = os.path.abspath(directory)
abs_target = os.path.abspath(target)

prefix = os.path.commonprefix([abs_directory, abs_target])

return prefix == abs_directory

def safe_extract(tar, path=".", members=None, *, numeric_owner=False):

for member in tar.getmembers():
member_path = os.path.join(path, member.name)
if not is_within_directory(path, member_path):
raise Exception("Attempted Path Traversal in Tar File")

tar.extractall(path, members, numeric_owner=numeric_owner)


safe_extract(fl, load_path)
ims = {
h: pimms.lmap(
{cd['name']: curry_load_legimage(load_path, h, cd['legend'])
Expand Down