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CVE-2007-4559 Patch #51

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CVE-2007-4559 Patch #51

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1cb972e
Adding tarfile member sanitization to extractall()
PatchTester Oct 1, 2022
4a765c9
Adding numeric_owner as keyword arguement
TrellixVulnTeam Oct 4, 2022
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21 changes: 20 additions & 1 deletion pebble_tool/sdk/manager.py
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,26 @@ def _install_from_handle(self, f):
raise SDKInstallError("Suspicious version number: {}".format(sdk_info['version']))
Requirements(sdk_info['requirements']).ensure_satisfied()
os.mkdir(os.path.join(self.sdk_dir, sdk_info['version']))
t.extractall(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(t, path)
virtualenv_path = os.path.join(path, ".env")
print("Preparing virtualenv... (this may take a while)")
subprocess.check_call([sys.executable, "-m", "virtualenv", virtualenv_path, "--no-site-packages"])
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