diff --git a/libpldmresponder/bios_attribute.cpp b/libpldmresponder/bios_attribute.cpp
index b0b834e..c519cb7 100644
--- a/libpldmresponder/bios_attribute.cpp
+++ b/libpldmresponder/bios_attribute.cpp
@@ -18,16 +18,32 @@
 BIOSAttribute::BIOSAttribute(const Json& entry,
                              DBusHandler* const dbusHandler) :
     name(entry.at("attribute_name")),
-    readOnly(!entry.contains("dbus")), dbusHandler(dbusHandler)
+    readOnly(false), dbusHandler(dbusHandler)
 {
+    try
+    {
+        readOnly = entry.at("readOnly");
+    }
+    catch (const std::exception& e)
+    {
+        // No action required, readOnly is initialised to false
+    }
+
     if (!readOnly)
     {
-        std::string objectPath = entry.at("dbus").at("object_path");
-        std::string interface = entry.at("dbus").at("interface");
-        std::string propertyName = entry.at("dbus").at("property_name");
-        std::string propertyType = entry.at("dbus").at("property_type");
+        try
+        {
+            std::string objectPath = entry.at("dbus").at("object_path");
+            std::string interface = entry.at("dbus").at("interface");
+            std::string propertyName = entry.at("dbus").at("property_name");
+            std::string propertyType = entry.at("dbus").at("property_type");
 
-        dBusMap = {objectPath, interface, propertyName, propertyType};
+            dBusMap = {objectPath, interface, propertyName, propertyType};
+        }
+        catch (const std::exception& e)
+        {
+            // No action required, dBusMap whill have no value
+        }
     }
 }
 
diff --git a/libpldmresponder/bios_attribute.hpp b/libpldmresponder/bios_attribute.hpp
index 7a15c09..b812844 100644
--- a/libpldmresponder/bios_attribute.hpp
+++ b/libpldmresponder/bios_attribute.hpp
@@ -89,7 +89,7 @@
     const std::string name;
 
     /** Weather this attribute is read-only */
-    const bool readOnly;
+    bool readOnly;
 
   protected:
     /** @brief dbus backend, nullopt if this attribute is read-only*/
diff --git a/libpldmresponder/bios_enum_attribute.cpp b/libpldmresponder/bios_enum_attribute.cpp
index e799cee..a5c7ee4 100644
--- a/libpldmresponder/bios_enum_attribute.cpp
+++ b/libpldmresponder/bios_enum_attribute.cpp
@@ -32,7 +32,7 @@
     }
     assert(defaultValues.size() == 1);
     defaultValue = defaultValues[0];
-    if (!readOnly)
+    if (dBusMap.has_value())
     {
         auto dbusValues = entry.at("dbus").at("property_values");
         buildValMap(dbusValues);
@@ -123,7 +123,7 @@
 uint8_t BIOSEnumAttribute::getAttrValueIndex()
 {
     auto defaultValueIndex = getValueIndex(defaultValue, possibleValues);
-    if (readOnly)
+    if (readOnly || !dBusMap.has_value())
     {
         return defaultValueIndex;
     }
@@ -150,10 +150,6 @@
 uint8_t BIOSEnumAttribute::getAttrValueIndex(const PropertyValue& propValue)
 {
     auto defaultValueIndex = getValueIndex(defaultValue, possibleValues);
-    if (readOnly)
-    {
-        return defaultValueIndex;
-    }
 
     try
     {
@@ -176,7 +172,7 @@
     const pldm_bios_attr_table_entry* attrEntry,
     const BIOSStringTable& stringTable)
 {
-    if (readOnly)
+    if (readOnly || !dBusMap.has_value())
     {
         return;
     }
@@ -256,7 +252,19 @@
     std::string value = std::get<std::string>(attributevalue);
     entry->attr_type = 0;
     entry->value[0] = 1; // number of current values, default 1
-    entry->value[1] = getAttrValueIndex(value);
+
+    if (readOnly)
+    {
+        entry->value[1] = getValueIndex(defaultValue, possibleValues);
+    }
+    else if (!dBusMap.has_value())
+    {
+        entry->value[1] = getValueIndex(value, possibleValues);
+    }
+    else
+    {
+        entry->value[1] = getAttrValueIndex(value);
+    }
 }
 
 } // namespace bios
diff --git a/libpldmresponder/bios_integer_attribute.cpp b/libpldmresponder/bios_integer_attribute.cpp
index a4bc14b..43a94d2 100644
--- a/libpldmresponder/bios_integer_attribute.cpp
+++ b/libpldmresponder/bios_integer_attribute.cpp
@@ -46,7 +46,7 @@
     const pldm_bios_attr_val_table_entry* attrValueEntry,
     const pldm_bios_attr_table_entry*, const BIOSStringTable&)
 {
-    if (readOnly)
+    if (readOnly || !dBusMap.has_value())
     {
         return;
     }
@@ -160,7 +160,7 @@
 
 uint64_t BIOSIntegerAttribute::getAttrValue()
 {
-    if (readOnly)
+    if (readOnly || !dBusMap.has_value())
     {
         return integerInfo.defaultValue;
     }
diff --git a/libpldmresponder/bios_string_attribute.cpp b/libpldmresponder/bios_string_attribute.cpp
index 19819c9..41538b6 100644
--- a/libpldmresponder/bios_string_attribute.cpp
+++ b/libpldmresponder/bios_string_attribute.cpp
@@ -60,7 +60,7 @@
     const pldm_bios_attr_val_table_entry* attrValueEntry,
     const pldm_bios_attr_table_entry*, const BIOSStringTable&)
 {
-    if (readOnly)
+    if (readOnly || !dBusMap.has_value())
     {
         return;
     }
@@ -72,7 +72,7 @@
 
 std::string BIOSStringAttribute::getAttrValue()
 {
-    if (readOnly)
+    if (readOnly || !dBusMap.has_value())
     {
         return stringInfo.defString;
     }
diff --git a/test/bios_jsons/enum_attrs.json b/test/bios_jsons/enum_attrs.json
index 24c20ff..5ad3ad2 100644
--- a/test/bios_jsons/enum_attrs.json
+++ b/test/bios_jsons/enum_attrs.json
@@ -4,6 +4,7 @@
          "attribute_name" : "HMCManagedState",
          "possible_values" : [ "On", "Off" ],
          "default_values" : [ "On" ],
+         "readOnly" : false,
          "dbus":
             {
                "object_path" : "/xyz/abc/def",
@@ -17,6 +18,7 @@
          "attribute_name" : "FWBootSide",
          "possible_values" : [ "Perm", "Temp" ],
          "default_values" : [ "Perm" ],
+         "readOnly" : false,
          "dbus":
             {
                "object_path" : "/xyz/abc/def",
@@ -30,6 +32,7 @@
          "attribute_name" : "InbandCodeUpdate",
          "possible_values" : [ "Allowed", "NotAllowed" ],
          "default_values" : [ "Allowed" ],
+         "readOnly" : false,
          "dbus":
             {
                "object_path" : "/xyz/abc/def",
@@ -42,7 +45,8 @@
       {
          "attribute_name" : "CodeUpdatePolicy",
          "possible_values" : [ "Concurrent", "Disruptive" ],
-         "default_values" : [ "Concurrent" ]
+         "default_values" : [ "Concurrent" ],
+         "readOnly" : true
       }
     ]
 }
diff --git a/test/bios_jsons/integer_attrs.json b/test/bios_jsons/integer_attrs.json
index b99a88b..576433e 100644
--- a/test/bios_jsons/integer_attrs.json
+++ b/test/bios_jsons/integer_attrs.json
@@ -6,6 +6,7 @@
          "upper_bound" : 15,
          "scalar_increment" : 1,
          "default_value" : 0,
+         "readOnly" : false,
          "dbus":{
             "object_path" : "/xyz/openbmc_project/avsbus",
             "interface" : "xyz.openbmc.AvsBus.Manager",
@@ -18,14 +19,16 @@
          "lower_bound" : 1,
          "upper_bound" : 15,
          "scalar_increment" : 1,
-         "default_value" : 2
+         "default_value" : 2,
+         "readOnly" : true
       },
       {
          "attribute_name" : "INTEGER_INVALID_CASE",
          "lower_bound" : 1,
          "upper_bound" : 15,
          "scalar_increment" : 2,
-         "default_value" : 3
+         "default_value" : 3,
+         "readOnly" : true
       }
    ]
 }
diff --git a/test/bios_jsons/string_attrs.json b/test/bios_jsons/string_attrs.json
index 6133412..e5b3920 100644
--- a/test/bios_jsons/string_attrs.json
+++ b/test/bios_jsons/string_attrs.json
@@ -7,6 +7,7 @@
             "maximum_string_length" : 100,
             "default_string_length" : 3,
             "default_string" : "abc",
+            "readOnly" : false,
             "dbus" : {
                 "object_path" : "/xyz/abc/def",
                 "interface" : "xyz.openbmc_project.str_example1.value",
@@ -21,6 +22,7 @@
             "maximum_string_length" : 100,
             "default_string_length" : 0,
             "default_string" : "",
+            "readOnly" : false,
             "dbus" : {
                 "object_path" : "/xyz/abc/def",
                 "interface" : "xyz.openbmc_project.str_example2.value",
@@ -34,7 +36,8 @@
             "minimum_string_length" : 1,
             "maximum_string_length" : 100,
             "default_string_length" : 2,
-            "default_string" : "ef"
+            "default_string" : "ef",
+            "readOnly" : true
         }
     ]
 }
diff --git a/test/libpldmresponder_bios_attribute_test.cpp b/test/libpldmresponder_bios_attribute_test.cpp
index 8abaac7..1a7e74a 100644
--- a/test/libpldmresponder_bios_attribute_test.cpp
+++ b/test/libpldmresponder_bios_attribute_test.cpp
@@ -42,7 +42,8 @@
 TEST(BIOSAttribute, CtorTest)
 {
     auto jsonReadOnly = R"({
-      "attribute_name" : "ReadOnly"
+      "attribute_name" : "ReadOnly",
+      "readOnly" : true
     })"_json;
 
     TestAttribute readOnly{jsonReadOnly, nullptr};
@@ -58,6 +59,7 @@
 
     auto jsonReadWrite = R"({
       "attribute_name":"ReadWrite",
+      "readOnly" : false,
       "dbus":
            {
                "object_path" : "/xyz/abc/def",
@@ -76,16 +78,4 @@
     EXPECT_EQ(dbusMap->interface, "xyz.openbmc.FWBoot.Side");
     EXPECT_EQ(dbusMap->propertyName, "Side");
     EXPECT_EQ(dbusMap->propertyType, "bool");
-
-    auto jsonReadWriteError = R"({
-      "attribute_name":"ReadWrite",
-      "dbus":
-           {
-               "object_path" : "/xyz/abc/def",
-               "interface" : "xyz.openbmc.FWBoot.Side",
-               "property_name" : "Side"
-           }
-    })"_json; // missing property_type.
-
-    EXPECT_THROW((TestAttribute{jsonReadWriteError, nullptr}), Json::exception);
 }
diff --git a/test/libpldmresponder_bios_enum_attribute_test.cpp b/test/libpldmresponder_bios_enum_attribute_test.cpp
index b6b53be..4a91dcb 100644
--- a/test/libpldmresponder_bios_enum_attribute_test.cpp
+++ b/test/libpldmresponder_bios_enum_attribute_test.cpp
@@ -34,7 +34,8 @@
     auto jsonEnumReadOnly = R"({
          "attribute_name" : "CodeUpdatePolicy",
          "possible_values" : [ "Concurrent", "Disruptive" ],
-         "default_values" : [ "Concurrent" ]
+         "default_values" : [ "Concurrent" ],
+         "readOnly" : true
       })"_json;
 
     BIOSEnumAttribute enumReadOnly{jsonEnumReadOnly, nullptr};
@@ -47,7 +48,8 @@
     auto jsonEnumReadOnlyError = R"({
          "attribute_name" : "CodeUpdatePolicy",
          "possible_value" : [ "Concurrent", "Disruptive" ],
-         "default_values" : [ "Concurrent" ]
+         "default_values" : [ "Concurrent" ],
+         "readOnly" : true
       })"_json; // possible_value -> possible_values
     EXPECT_THROW((BIOSEnumAttribute{jsonEnumReadOnlyError, nullptr}),
                  Json::exception);
@@ -56,6 +58,7 @@
          "attribute_name" : "FWBootSide",
          "possible_values" : [ "Perm", "Temp" ],
          "default_values" : [ "Perm" ],
+         "readOnly" : false,
          "dbus":
             {
                "object_path" : "/xyz/abc/def",
@@ -79,7 +82,8 @@
     auto jsonEnumReadOnly = R"({
          "attribute_name" : "CodeUpdatePolicy",
          "possible_values" : [ "Concurrent", "Disruptive" ],
-         "default_values" : [ "Disruptive" ]
+         "default_values" : [ "Disruptive" ],
+         "readOnly" : true
       })"_json;
 
     std::vector<uint8_t> expectedAttrEntry{
@@ -116,6 +120,7 @@
          "attribute_name" : "CodeUpdatePolicy",
          "possible_values" : [ "Concurrent", "Disruptive" ],
          "default_values" : [ "Disruptive" ],
+         "readOnly" : false,
          "dbus":
             {
                "object_path" : "/xyz/abc/def",
@@ -165,6 +170,7 @@
          "attribute_name" : "CodeUpdatePolicy",
          "possible_values" : [ "Concurrent", "Disruptive" ],
          "default_values" : [ "Disruptive" ],
+         "readOnly" : false,
          "dbus":
             {
                "object_path" : "/xyz/abc/def",
diff --git a/test/libpldmresponder_bios_integer_attribute_test.cpp b/test/libpldmresponder_bios_integer_attribute_test.cpp
index 48c228b..4004ae9 100644
--- a/test/libpldmresponder_bios_integer_attribute_test.cpp
+++ b/test/libpldmresponder_bios_integer_attribute_test.cpp
@@ -31,7 +31,8 @@
          "lower_bound" : 1,
          "upper_bound" : 15,
          "scalar_increment" : 1,
-         "default_value" : 2
+         "default_value" : 2,
+         "readOnly" : true
       })"_json;
 
     BIOSIntegerAttribute integerReadOnly{jsonIntegerReadOnly, nullptr};
@@ -48,7 +49,8 @@
          "lower_bound" : 1,
          "upper_bound" : 15,
          "scalar_increment" : 1,
-         "default_valu" : 2
+         "default_valu" : 2,
+         "readOnly" : true
       })"_json; // default_valu -> default_value
     EXPECT_THROW((BIOSIntegerAttribute{jsonIntegerReadOnlyError, nullptr}),
                  Json::exception);
@@ -59,6 +61,7 @@
          "upper_bound" : 15,
          "scalar_increment" : 1,
          "default_value" : 0,
+         "readOnly" : false,
          "dbus":{
             "object_path" : "/xyz/openbmc_project/avsbus",
             "interface" : "xyz.openbmc.AvsBus.Manager",
@@ -82,7 +85,8 @@
          "lower_bound" : 1,
          "upper_bound" : 15,
          "scalar_increment" : 1,
-         "default_value" : 2
+         "default_value" : 2,
+         "readOnly" : true
       })"_json;
 
     std::vector<uint8_t> expectedAttrEntry{
@@ -114,6 +118,7 @@
          "upper_bound" : 15,
          "scalar_increment" : 1,
          "default_value" : 2,
+         "readOnly" : false,
          "dbus":{
             "object_path" : "/xyz/openbmc_project/avsbus",
             "interface" : "xyz.openbmc.AvsBus.Manager",
@@ -163,6 +168,7 @@
          "upper_bound" : 15,
          "scalar_increment" : 1,
          "default_value" : 2,
+         "readOnly" : false,
          "dbus":{
             "object_path" : "/xyz/openbmc_project/avsbus",
             "interface" : "xyz.openbmc.AvsBus.Manager",
diff --git a/test/libpldmresponder_bios_string_attribute_test.cpp b/test/libpldmresponder_bios_string_attribute_test.cpp
index 953d47d..01079c3 100644
--- a/test/libpldmresponder_bios_string_attribute_test.cpp
+++ b/test/libpldmresponder_bios_string_attribute_test.cpp
@@ -33,7 +33,8 @@
             "minimum_string_length" : 1,
             "maximum_string_length" : 100,
             "default_string_length" : 2,
-            "default_string" : "ef"
+            "default_string" : "ef",
+            "readOnly" : true
         })"_json;
     BIOSStringAttribute stringReadOnly{jsonStringReadOnly, nullptr};
     EXPECT_EQ(stringReadOnly.name, "str_example3");
@@ -65,6 +66,7 @@
             "maximum_string_length" : 100,
             "default_string_length" : 3,
             "default_string" : "abc",
+            "readOnly" : false,
             "dbus" : {
                 "object_path" : "/xyz/abc/def",
                 "interface" : "xyz.openbmc_project.str_example1.value",
@@ -89,7 +91,8 @@
             "minimum_string_length" : 1,
             "maximum_string_length" : 100,
             "default_string_length" : 3,
-            "default_string" : "abc"
+            "default_string" : "abc",
+            "readOnly" : true
         })"_json;
 
     std::vector<uint8_t> expectedAttrEntry{
@@ -124,6 +127,7 @@
             "maximum_string_length" : 100,
             "default_string_length" : 3,
             "default_string" : "abc",
+            "readOnly" : false,
             "dbus" : {
                 "object_path" : "/xyz/abc/def",
                 "interface" : "xyz.openbmc_project.str_example1.value",
@@ -172,6 +176,7 @@
             "maximum_string_length" : 100,
             "default_string_length" : 3,
             "default_string" : "abc",
+            "readOnly" : false,
             "dbus" : {
                 "object_path" : "/xyz/abc/def",
                 "interface" : "xyz.openbmc_project.str_example1.value",