From d47bc17e0ed8aaef6f27966ed25083cec409ceca Mon Sep 17 00:00:00 2001
From: TrellixVulnTeam <charles.mcfarland@trellix.com>
Date: Wed, 21 Dec 2022 11:51:32 +0000
Subject: [PATCH] Adding tarfile member sanitization to extractall()

---
 DomainBed/wilds/datasets/download_utils.py | 63 ++++++++++++++++++++--
 1 file changed, 60 insertions(+), 3 deletions(-)

diff --git a/DomainBed/wilds/datasets/download_utils.py b/DomainBed/wilds/datasets/download_utils.py
index 97ce0aa..96daa15 100755
--- a/DomainBed/wilds/datasets/download_utils.py
+++ b/DomainBed/wilds/datasets/download_utils.py
@@ -256,13 +256,70 @@ def extract_archive(from_path: str, to_path: Optional[str] = None, remove_finish
 
     if _is_tar(from_path):
         with tarfile.open(from_path, 'r') as tar:
-            tar.extractall(path=to_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(tar, path=to_path)
     elif _is_targz(from_path) or _is_tgz(from_path):
         with tarfile.open(from_path, 'r:gz') as tar:
-            tar.extractall(path=to_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(tar, path=to_path)
     elif _is_tarxz(from_path):
         with tarfile.open(from_path, 'r:xz') as tar:
-            tar.extractall(path=to_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(tar, path=to_path)
     elif _is_gzip(from_path):
         to_path = os.path.join(to_path, os.path.splitext(os.path.basename(from_path))[0])
         with open(to_path, "wb") as out_f, gzip.GzipFile(from_path) as zip_f: