protobuf: fix CVE-2025-4565

Backport patch with adjustments for 3.19.6 version to fix
CVE-2025-4565.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-devtools/protobuf/protobuf/CVE-2025-4565.patch

@@ -0,0 +1,376 @@
+From 0b48d64d7fcfd34514b6fa9b046d40457ed3e4b9 Mon Sep 17 00:00:00 2001
+From: shaod2 <shaod@google.com>
+Date: Wed, 21 May 2025 14:30:53 -0400
+Subject: [PATCH] Manually backport recursion limit enforcement to 25.x
+
+CVE: CVE-2025-4565
+
+Upstream-Status: Backport [d31100c9195819edb0a12f44705dfc2da111ea9b]
+Adjusted for the 3.19.6 version, resolving conflicts and removing
+unused testing codes.
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+---
+ python/google/protobuf/internal/decoder.py    | 110 ++++++++++++++----
+ .../protobuf/internal/python_message.py       |   6 +-
+ .../protobuf/internal/self_recursive.proto    |  17 +++
+ 3 files changed, 106 insertions(+), 27 deletions(-)
+ create mode 100644 python/google/protobuf/internal/self_recursive.proto
+
+diff --git a/python/google/protobuf/internal/decoder.py b/python/google/protobuf/internal/decoder.py
+index bc1b7b785..445c1d0d2 100644
+--- a/python/google/protobuf/internal/decoder.py
++++ b/python/google/protobuf/internal/decoder.py
+@@ -195,7 +195,10 @@ def _SimpleDecoder(wire_type, decode_value):
+                       clear_if_default=False):
+     if is_packed:
+       local_DecodeVarint = _DecodeVarint
+-      def DecodePackedField(buffer, pos, end, message, field_dict):
++      def DecodePackedField(
++          buffer, pos, end, message, field_dict, current_depth=0
++      ):
++        del current_depth # unused
+         value = field_dict.get(key)
+         if value is None:
+           value = field_dict.setdefault(key, new_default(message))
+@@ -214,7 +217,10 @@ def _SimpleDecoder(wire_type, decode_value):
+     elif is_repeated:
+       tag_bytes = encoder.TagBytes(field_number, wire_type)
+       tag_len = len(tag_bytes)
+-      def DecodeRepeatedField(buffer, pos, end, message, field_dict):
++      def DecodeRepeatedField(
++          buffer, pos, end, message, field_dict, current_depth=0
++      ):
++        del current_depth # unused
+         value = field_dict.get(key)
+         if value is None:
+           value = field_dict.setdefault(key, new_default(message))
+@@ -231,7 +237,8 @@ def _SimpleDecoder(wire_type, decode_value):
+             return new_pos
+       return DecodeRepeatedField
+     else:
+-      def DecodeField(buffer, pos, end, message, field_dict):
++      def DecodeField(buffer, pos, end, message, field_dict, current_depth=0):
++        del current_depth # unused
+         (new_value, pos) = decode_value(buffer, pos)
+         if pos > end:
+           raise _DecodeError('Truncated message.')
+@@ -375,7 +382,9 @@ def EnumDecoder(field_number, is_repeated, is_packed, key, new_default,
+   enum_type = key.enum_type
+   if is_packed:
+     local_DecodeVarint = _DecodeVarint
+-    def DecodePackedField(buffer, pos, end, message, field_dict):
++    def DecodePackedField(
++        buffer, pos, end, message, field_dict, current_depth=0
++    ):
+       """Decode serialized packed enum to its value and a new position.
+ 
+       Args:
+@@ -388,6 +397,7 @@ def EnumDecoder(field_number, is_repeated, is_packed, key, new_default,
+       Returns:
+         int, new position in serialized data.
+       """
++      del current_depth # unused
+       value = field_dict.get(key)
+       if value is None:
+         value = field_dict.setdefault(key, new_default(message))
+@@ -428,7 +438,9 @@ def EnumDecoder(field_number, is_repeated, is_packed, key, new_default,
+   elif is_repeated:
+     tag_bytes = encoder.TagBytes(field_number, wire_format.WIRETYPE_VARINT)
+     tag_len = len(tag_bytes)
+-    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
++    def DecodeRepeatedField(
++        buffer, pos, end, message, field_dict, current_depth=0
++    ):
+       """Decode serialized repeated enum to its value and a new position.
+ 
+       Args:
+@@ -441,6 +453,7 @@ def EnumDecoder(field_number, is_repeated, is_packed, key, new_default,
+       Returns:
+         int, new position in serialized data.
+       """
++      del current_depth # unused
+       value = field_dict.get(key)
+       if value is None:
+         value = field_dict.setdefault(key, new_default(message))
+@@ -469,7 +482,7 @@ def EnumDecoder(field_number, is_repeated, is_packed, key, new_default,
+           return new_pos
+     return DecodeRepeatedField
+   else:
+-    def DecodeField(buffer, pos, end, message, field_dict):
++    def DecodeField(buffer, pos, end, message, field_dict, current_depth=0):
+       """Decode serialized repeated enum to its value and a new position.
+ 
+       Args:
+@@ -482,6 +495,7 @@ def EnumDecoder(field_number, is_repeated, is_packed, key, new_default,
+       Returns:
+         int, new position in serialized data.
+       """
++      del current_depth # unused
+       value_start_pos = pos
+       (enum_value, pos) = _DecodeSignedVarint32(buffer, pos)
+       if pos > end:
+@@ -563,7 +577,10 @@ def StringDecoder(field_number, is_repeated, is_packed, key, new_default,
+     tag_bytes = encoder.TagBytes(field_number,
+                                  wire_format.WIRETYPE_LENGTH_DELIMITED)
+     tag_len = len(tag_bytes)
+-    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
++    def DecodeRepeatedField(
++        buffer, pos, end, message, field_dict, current_depth=0
++    ):
++      del current_depth # unused
+       value = field_dict.get(key)
+       if value is None:
+         value = field_dict.setdefault(key, new_default(message))
+@@ -580,7 +597,8 @@ def StringDecoder(field_number, is_repeated, is_packed, key, new_default,
+           return new_pos
+     return DecodeRepeatedField
+   else:
+-    def DecodeField(buffer, pos, end, message, field_dict):
++    def DecodeField(buffer, pos, end, message, field_dict, current_depth=0):
++      del current_depth # unused
+       (size, pos) = local_DecodeVarint(buffer, pos)
+       new_pos = pos + size
+       if new_pos > end:
+@@ -604,7 +622,10 @@ def BytesDecoder(field_number, is_repeated, is_packed, key, new_default,
+     tag_bytes = encoder.TagBytes(field_number,
+                                  wire_format.WIRETYPE_LENGTH_DELIMITED)
+     tag_len = len(tag_bytes)
+-    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
++    def DecodeRepeatedField(
++        buffer, pos, end, message, field_dict, current_depth=0
++    ):
++      del current_depth # unused
+       value = field_dict.get(key)
+       if value is None:
+         value = field_dict.setdefault(key, new_default(message))
+@@ -621,7 +642,8 @@ def BytesDecoder(field_number, is_repeated, is_packed, key, new_default,
+           return new_pos
+     return DecodeRepeatedField
+   else:
+-    def DecodeField(buffer, pos, end, message, field_dict):
++    def DecodeField(buffer, pos, end, message, field_dict, current_depth=0):
++      del current_depth # unused
+       (size, pos) = local_DecodeVarint(buffer, pos)
+       new_pos = pos + size
+       if new_pos > end:
+@@ -646,7 +668,9 @@ def GroupDecoder(field_number, is_repeated, is_packed, key, new_default):
+     tag_bytes = encoder.TagBytes(field_number,
+                                  wire_format.WIRETYPE_START_GROUP)
+     tag_len = len(tag_bytes)
+-    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
++    def DecodeRepeatedField(
++        buffer, pos, end, message, field_dict, current_depth=0
++    ):
+       value = field_dict.get(key)
+       if value is None:
+         value = field_dict.setdefault(key, new_default(message))
+@@ -655,7 +679,13 @@ def GroupDecoder(field_number, is_repeated, is_packed, key, new_default):
+         if value is None:
+           value = field_dict.setdefault(key, new_default(message))
+         # Read sub-message.
+-        pos = value.add()._InternalParse(buffer, pos, end)
++        current_depth += 1
++        if current_depth > _recursion_limit:
++          raise _DecodeError(
++              'Error parsing message: too many levels of nesting.'
++          )
++        pos = value.add()._InternalParse(buffer, pos, end, current_depth)
++        current_depth -= 1
+         # Read end tag.
+         new_pos = pos+end_tag_len
+         if buffer[pos:new_pos] != end_tag_bytes or new_pos > end:
+@@ -667,12 +697,16 @@ def GroupDecoder(field_number, is_repeated, is_packed, key, new_default):
+           return new_pos
+     return DecodeRepeatedField
+   else:
+-    def DecodeField(buffer, pos, end, message, field_dict):
++    def DecodeField(buffer, pos, end, message, field_dict, current_depth=0):
+       value = field_dict.get(key)
+       if value is None:
+         value = field_dict.setdefault(key, new_default(message))
+       # Read sub-message.
+-      pos = value._InternalParse(buffer, pos, end)
++      current_depth += 1
++      if current_depth > _recursion_limit:
++        raise _DecodeError('Error parsing message: too many levels of nesting.')
++      pos = value._InternalParse(buffer, pos, end, current_depth)
++      current_depth -= 1
+       # Read end tag.
+       new_pos = pos+end_tag_len
+       if buffer[pos:new_pos] != end_tag_bytes or new_pos > end:
+@@ -691,7 +725,9 @@ def MessageDecoder(field_number, is_repeated, is_packed, key, new_default):
+     tag_bytes = encoder.TagBytes(field_number,
+                                  wire_format.WIRETYPE_LENGTH_DELIMITED)
+     tag_len = len(tag_bytes)
+-    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
++    def DecodeRepeatedField(
++        buffer, pos, end, message, field_dict, current_depth=0
++    ):
+       value = field_dict.get(key)
+       if value is None:
+         value = field_dict.setdefault(key, new_default(message))
+@@ -702,18 +738,27 @@ def MessageDecoder(field_number, is_repeated, is_packed, key, new_default):
+         if new_pos > end:
+           raise _DecodeError('Truncated message.')
+         # Read sub-message.
+-        if value.add()._InternalParse(buffer, pos, new_pos) != new_pos:
++        current_depth += 1
++        if current_depth > _recursion_limit:
++          raise _DecodeError(
++              'Error parsing message: too many levels of nesting.'
++          )
++        if (
++            value.add()._InternalParse(buffer, pos, new_pos, current_depth)
++            != new_pos
++        ):
+           # The only reason _InternalParse would return early is if it
+           # encountered an end-group tag.
+           raise _DecodeError('Unexpected end-group tag.')
+         # Predict that the next tag is another copy of the same repeated field.
++        current_depth -= 1
+         pos = new_pos + tag_len
+         if buffer[new_pos:pos] != tag_bytes or new_pos == end:
+           # Prediction failed.  Return.
+           return new_pos
+     return DecodeRepeatedField
+   else:
+-    def DecodeField(buffer, pos, end, message, field_dict):
++    def DecodeField(buffer, pos, end, message, field_dict, current_depth=0):
+       value = field_dict.get(key)
+       if value is None:
+         value = field_dict.setdefault(key, new_default(message))
+@@ -722,11 +767,14 @@ def MessageDecoder(field_number, is_repeated, is_packed, key, new_default):
+       new_pos = pos + size
+       if new_pos > end:
+         raise _DecodeError('Truncated message.')
+-      # Read sub-message.
+-      if value._InternalParse(buffer, pos, new_pos) != new_pos:
++      current_depth += 1
++      if current_depth > _recursion_limit:
++        raise _DecodeError('Error parsing message: too many levels of nesting.')
++      if value._InternalParse(buffer, pos, new_pos, current_depth) != new_pos:
+         # The only reason _InternalParse would return early is if it encountered
+         # an end-group tag.
+         raise _DecodeError('Unexpected end-group tag.')
++      current_depth -= 1
+       return new_pos
+     return DecodeField
+ 
+@@ -844,7 +892,8 @@ def MapDecoder(field_descriptor, new_default, is_message_map):
+   # Can't read _concrete_class yet; might not be initialized.
+   message_type = field_descriptor.message_type
+ 
+-  def DecodeMap(buffer, pos, end, message, field_dict):
++  def DecodeMap(buffer, pos, end, message, field_dict, current_depth=0):
++    del current_depth # unused
+     submsg = message_type._concrete_class()
+     value = field_dict.get(key)
+     if value is None:
+@@ -926,8 +975,16 @@ def _SkipGroup(buffer, pos, end):
+       return pos
+     pos = new_pos
+ 
++DEFAULT_RECURSION_LIMIT = 100
++_recursion_limit = DEFAULT_RECURSION_LIMIT
++
++
++def SetRecursionLimit(new_limit):
++  global _recursion_limit
++  _recursion_limit = new_limit
++
+ 
+-def _DecodeUnknownFieldSet(buffer, pos, end_pos=None):
++def _DecodeUnknownFieldSet(buffer, pos, end_pos=None, current_depth=0):
+   """Decode UnknownFieldSet.  Returns the UnknownFieldSet and new position."""
+ 
+   unknown_field_set = containers.UnknownFieldSet()
+@@ -937,14 +994,14 @@ def _DecodeUnknownFieldSet(buffer, pos, end_pos=None):
+     field_number, wire_type = wire_format.UnpackTag(tag)
+     if wire_type == wire_format.WIRETYPE_END_GROUP:
+       break
+-    (data, pos) = _DecodeUnknownField(buffer, pos, wire_type)
++    (data, pos) = _DecodeUnknownField(buffer, pos, wire_type, current_depth)
+     # pylint: disable=protected-access
+     unknown_field_set._add(field_number, wire_type, data)
+ 
+   return (unknown_field_set, pos)
+ 
+ 
+-def _DecodeUnknownField(buffer, pos, wire_type):
++def _DecodeUnknownField(buffer, pos, wire_type, current_depth=0):
+   """Decode a unknown field.  Returns the UnknownField and new position."""
+ 
+   if wire_type == wire_format.WIRETYPE_VARINT:
+@@ -958,7 +1015,12 @@ def _DecodeUnknownField(buffer, pos, wire_type):
+     data = buffer[pos:pos+size].tobytes()
+     pos += size
+   elif wire_type == wire_format.WIRETYPE_START_GROUP:
+-    (data, pos) = _DecodeUnknownFieldSet(buffer, pos)
++    print("MMP " + str(current_depth))
++    current_depth += 1
++    if current_depth >= _recursion_limit:
++      raise _DecodeError('Error parsing message: too many levels of nesting.')
++    (data, pos) = _DecodeUnknownFieldSet(buffer, pos, None, current_depth)
++    current_depth -= 1
+   elif wire_type == wire_format.WIRETYPE_END_GROUP:
+     return (0, -1)
+   else:
+diff --git a/python/google/protobuf/internal/python_message.py b/python/google/protobuf/internal/python_message.py
+index 2921d5cb6..c7fec8c1c 100644
+--- a/python/google/protobuf/internal/python_message.py
++++ b/python/google/protobuf/internal/python_message.py
+@@ -1141,7 +1141,7 @@ def _AddMergeFromStringMethod(message_descriptor, cls):
+   local_SkipField = decoder.SkipField
+   decoders_by_tag = cls._decoders_by_tag
+ 
+-  def InternalParse(self, buffer, pos, end):
++  def InternalParse(self, buffer, pos, end, current_depth=0):
+     """Create a message from serialized bytes.
+ 
+     Args:
+@@ -1179,7 +1179,7 @@ def _AddMergeFromStringMethod(message_descriptor, cls):
+         # TODO(jieluo): remove old_pos.
+         old_pos = new_pos
+         (data, new_pos) = decoder._DecodeUnknownField(
+-            buffer, new_pos, wire_type)  # pylint: disable=protected-access
++            buffer, new_pos, wire_type, current_depth)  # pylint: disable=protected-access
+         if new_pos == -1:
+           return pos
+         # pylint: disable=protected-access
+@@ -1192,7 +1192,7 @@ def _AddMergeFromStringMethod(message_descriptor, cls):
+             (tag_bytes, buffer[old_pos:new_pos].tobytes()))
+         pos = new_pos
+       else:
+-        pos = field_decoder(buffer, new_pos, end, self, field_dict)
++        pos = field_decoder(buffer, new_pos, end, self, field_dict, current_depth)
+         if field_desc:
+           self._UpdateOneofState(field_desc)
+     return pos
+diff --git a/python/google/protobuf/internal/self_recursive.proto b/python/google/protobuf/internal/self_recursive.proto
+new file mode 100644
+index 000000000..2a7aacb0b
+--- /dev/null
++++ b/python/google/protobuf/internal/self_recursive.proto
+@@ -0,0 +1,17 @@
++// Protocol Buffers - Google's data interchange format
++// Copyright 2024 Google Inc.  All rights reserved.
++//
++// Use of this source code is governed by a BSD-style
++// license that can be found in the LICENSE file or at
++// https://developers.google.com/open-source/licenses/bsd
++
++syntax = "proto2";
++
++package google.protobuf.python.internal;
++
++message SelfRecursive {
++  optional group RecursiveGroup = 1 {
++    optional RecursiveGroup sub_group = 2;
++    optional int32 i = 3;
++  };
++}
+\ No newline at end of file
+-- 
+2.34.1
+

meta-oe/recipes-devtools/protobuf/protobuf_3.19.6.bb

@@ -20,6 +20,7 @@ SRC_URI = "git://github.com/protocolbuffers/protobuf.git;branch=3.19.x;protocol=
            file://0001-Fix-linking-error-with-ld-gold.patch \
            file://0001-Lower-init-prio-for-extension-attributes.patch \
            file://0001-Add-recursion-check-when-parsing-unknown-fields-in-J.patch \
+           file://CVE-2025-4565.patch \
            "
 SRC_URI:append:mips:toolchain-clang = " file://0001-Fix-build-on-mips-clang.patch "
 SRC_URI:append:mipsel:toolchain-clang = " file://0001-Fix-build-on-mips-clang.patch "