Fix buffer overflow in CompressionCodecMultiple

ClickHouse · Mar 4, 2024 · 9a5085a · 9a5085a
1 parent aeb5b9e
commit 9a5085a
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Showing 3 changed files with 31 additions and 2 deletions.
diff --git a/src/Compression/CompressionCodecMultiple.cpp b/src/Compression/CompressionCodecMultiple.cpp
@@ -88,14 +88,34 @@ void CompressionCodecMultiple::doDecompressData(const char * source, UInt32 sour
         const auto codec = CompressionCodecFactory::instance().get(compression_method);
         auto additional_size_at_the_end_of_buffer = codec->getAdditionalSizeAtTheEndOfBuffer();
 
-        compressed_buf.resize(compressed_buf.size() + additional_size_at_the_end_of_buffer);
+        if (compressed_buf.size() >= 1_GiB)
+            throw Exception(decompression_error_code, "Too large compressed size: {}", compressed_buf.size());
+
+        {
+            UInt32 bytes_to_resize;
+            if (common::addOverflow(static_cast<UInt32>(compressed_buf.size()), additional_size_at_the_end_of_buffer, bytes_to_resize))
+                throw Exception(decompression_error_code, "Too large compressed size: {}", compressed_buf.size());
+
+            compressed_buf.resize(compressed_buf.size() + additional_size_at_the_end_of_buffer);
+        }
+
         UInt32 uncompressed_size = readDecompressedBlockSize(compressed_buf.data());
 
+        if (uncompressed_size >= 1_GiB)
+            throw Exception(decompression_error_code, "Too large uncompressed size: {}", uncompressed_size);
+
         if (idx == 0 && uncompressed_size != decompressed_size)
             throw Exception(decompression_error_code, "Wrong final decompressed size in codec Multiple, got {}, expected {}",
                 uncompressed_size, decompressed_size);
 
-        uncompressed_buf.resize(uncompressed_size + additional_size_at_the_end_of_buffer);
+        {
+            UInt32 bytes_to_resize;
+            if (common::addOverflow(uncompressed_size, additional_size_at_the_end_of_buffer, bytes_to_resize))
+                throw Exception(decompression_error_code, "Too large uncompressed size: {}", uncompressed_size);
+
+            uncompressed_buf.resize(bytes_to_resize);
+        }
+
         codec->decompress(compressed_buf.data(), source_size, uncompressed_buf.data());
         uncompressed_buf.swap(compressed_buf);
         source_size = uncompressed_size;

diff --git a/tests/queries/0_stateless/03003_codec_multiple_buffer_overflow.reference b/tests/queries/0_stateless/03003_codec_multiple_buffer_overflow.reference
@@ -0,0 +1 @@
+Too large
diff --git a/tests/queries/0_stateless/03003_codec_multiple_buffer_overflow.sh b/tests/queries/0_stateless/03003_codec_multiple_buffer_overflow.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CURDIR"/../shell_config.sh
+
+echo -ne 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|
+    ${CLICKHOUSE_CURL} "${CLICKHOUSE_URL}&decompress=1&http_native_compression_disable_checksumming_on_decompress=1" --data-binary @- | grep -o -F 'Too large'