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check offset in ExifReader::getString

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jiakai 2015-11-11 20:17:24 +08:00
parent b4112a5878
commit 933dfed4b8
1 changed files with 3 additions and 0 deletions
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3
modules/imgcodecs/src/jpeg_exif.cpp
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@ -401,6 +401,9 @@ std::string ExifReader::getString(const size_t offset) const
{ {
dataOffset = getU32( offset + 8 ); dataOffset = getU32( offset + 8 );
} }
if (dataOffset > m_data.size() || dataOffset + size > m_data.size()) {
throw ExifParsingError();
}
std::vector<uint8_t>::const_iterator it = m_data.begin() + dataOffset; std::vector<uint8_t>::const_iterator it = m_data.begin() + dataOffset;
std::string result( it, it + size ); //copy vector content into result std::string result( it, it + size ); //copy vector content into result