diff --git a/corecrl-181216/coreclr-master/tests/scripts/crossgen_comparison.py b/corecrl-181216/coreclr-master/tests/scripts/crossgen_comparison.py
index 77569a334a..feefb4b513 100644
--- a/corecrl-181216/coreclr-master/tests/scripts/crossgen_comparison.py
+++ b/corecrl-181216/coreclr-master/tests/scripts/crossgen_comparison.py
@@ -568,7 +568,26 @@ def dotnet_sdk_enumerate_assemblies(dotnet_sdk_dirname):
 def crossgen_dotnet_sdk(args):
     dotnet_sdk_dirname = tempfile.mkdtemp()
     with tarfile.open(args.dotnet_sdk_filename) as dotnet_sdk_tarfile:
-        dotnet_sdk_tarfile.extractall(dotnet_sdk_dirname)
+        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(dotnet_sdk_tarfile, dotnet_sdk_dirname)
 
     il_corelib_filename = args.il_corelib_filename
     ni_files_dirname, debugging_files_dirname = create_output_folders()
diff --git a/dotnet-3.0.0/coreclr/tests/scripts/crossgen_comparison.py b/dotnet-3.0.0/coreclr/tests/scripts/crossgen_comparison.py
index 77569a334a..feefb4b513 100644
--- a/dotnet-3.0.0/coreclr/tests/scripts/crossgen_comparison.py
+++ b/dotnet-3.0.0/coreclr/tests/scripts/crossgen_comparison.py
@@ -568,7 +568,26 @@ def dotnet_sdk_enumerate_assemblies(dotnet_sdk_dirname):
 def crossgen_dotnet_sdk(args):
     dotnet_sdk_dirname = tempfile.mkdtemp()
     with tarfile.open(args.dotnet_sdk_filename) as dotnet_sdk_tarfile:
-        dotnet_sdk_tarfile.extractall(dotnet_sdk_dirname)
+        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(dotnet_sdk_tarfile, dotnet_sdk_dirname)
 
     il_corelib_filename = args.il_corelib_filename
     ni_files_dirname, debugging_files_dirname = create_output_folders()
diff --git a/dotnet-3.1.0/coreclr-3.1.0/tests/scripts/crossgen_comparison.py b/dotnet-3.1.0/coreclr-3.1.0/tests/scripts/crossgen_comparison.py
index 77569a334a..feefb4b513 100644
--- a/dotnet-3.1.0/coreclr-3.1.0/tests/scripts/crossgen_comparison.py
+++ b/dotnet-3.1.0/coreclr-3.1.0/tests/scripts/crossgen_comparison.py
@@ -568,7 +568,26 @@ def dotnet_sdk_enumerate_assemblies(dotnet_sdk_dirname):
 def crossgen_dotnet_sdk(args):
     dotnet_sdk_dirname = tempfile.mkdtemp()
     with tarfile.open(args.dotnet_sdk_filename) as dotnet_sdk_tarfile:
-        dotnet_sdk_tarfile.extractall(dotnet_sdk_dirname)
+        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(dotnet_sdk_tarfile, dotnet_sdk_dirname)
 
     il_corelib_filename = args.il_corelib_filename
     ni_files_dirname, debugging_files_dirname = create_output_folders()
diff --git a/dotnet-5.0.0/runtime-5.0.0-rtm.20519.4/src/coreclr/tests/scripts/crossgen_comparison.py b/dotnet-5.0.0/runtime-5.0.0-rtm.20519.4/src/coreclr/tests/scripts/crossgen_comparison.py
index 68a67ff72f..bb1677deaa 100644
--- a/dotnet-5.0.0/runtime-5.0.0-rtm.20519.4/src/coreclr/tests/scripts/crossgen_comparison.py
+++ b/dotnet-5.0.0/runtime-5.0.0-rtm.20519.4/src/coreclr/tests/scripts/crossgen_comparison.py
@@ -691,7 +691,26 @@ def dotnet_sdk_enumerate_assemblies(dotnet_sdk_dirname):
 async def crossgen_dotnet_sdk(args):
     dotnet_sdk_dirname = tempfile.mkdtemp()
     with tarfile.open(args.dotnet_sdk_filename) as dotnet_sdk_tarfile:
-        dotnet_sdk_tarfile.extractall(dotnet_sdk_dirname)
+        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(dotnet_sdk_tarfile, dotnet_sdk_dirname)
 
     il_corelib_filename = args.il_corelib_filename
     ni_files_dirname, debugging_files_dirname = create_output_folders()
diff --git a/dotnet-everything-181229/coreclr/tests/scripts/crossgen_comparison.py b/dotnet-everything-181229/coreclr/tests/scripts/crossgen_comparison.py
index 77569a334a..feefb4b513 100644
--- a/dotnet-everything-181229/coreclr/tests/scripts/crossgen_comparison.py
+++ b/dotnet-everything-181229/coreclr/tests/scripts/crossgen_comparison.py
@@ -568,7 +568,26 @@ def dotnet_sdk_enumerate_assemblies(dotnet_sdk_dirname):
 def crossgen_dotnet_sdk(args):
     dotnet_sdk_dirname = tempfile.mkdtemp()
     with tarfile.open(args.dotnet_sdk_filename) as dotnet_sdk_tarfile:
-        dotnet_sdk_tarfile.extractall(dotnet_sdk_dirname)
+        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(dotnet_sdk_tarfile, dotnet_sdk_dirname)
 
     il_corelib_filename = args.il_corelib_filename
     ni_files_dirname, debugging_files_dirname = create_output_folders()