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https://github.com/owasp-modsecurity/ModSecurity.git
synced 2025-08-14 05:45:59 +03:00
Fix multipart parser on binary content
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23d843259d
commit
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@ -192,7 +192,6 @@ bool Multipart::process(std::string data) {
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debug(4, "Multipart: Boundary was not the first thing.");
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this->containsDataBefore = true;
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}
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while (start != std::string::npos) {
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size_t end = data.find(m_boundary, start + m_boundary.length());
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if (end == std::string::npos) {
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@ -204,6 +203,10 @@ bool Multipart::process(std::string data) {
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checkForCrlfLf(block);
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if (this->crlf) {
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block.erase(0, 1);
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}
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blobs.push_back(block);
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lastValidBoundary = end;
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start = end;
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@ -223,21 +226,31 @@ bool Multipart::process(std::string data) {
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std::string filename("");
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std::string name("");
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int i = 0;
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for (std::string x : blobs) {
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i++;
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debug(5, "Multipart: Inspecting blob: " + std::to_string(i));
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MultipartBlob m(x, this);
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if (m.name.empty() == false) {
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name = m.name;
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} else {
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name = "no-name-" + std::to_string(i);
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}
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if (m.filename.empty() == false) {
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filename = m.filename;
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variables.emplace("FILES:" + m.name, m.filename);
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variables.emplace("FILES_NAMES:" + m.name, m.name);
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variables.emplace("FILES_SIZES:" + m.name,
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std::to_string(m.content.size()));
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variables.emplace("FILES_TMP_CONTENT:" + m.name, m.content);
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files_size = files_size + m.content.size();
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} else {
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filename = "no-file-name-" + std::to_string(i);
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}
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variables.emplace("FILES:" + name, filename);
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variables.emplace("FILES_NAMES:" + name, name);
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variables.emplace("FILES_SIZES:" + name,
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std::to_string(m.content.size()));
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debug(5, "Multipart: Saving FILES_TMP_CONTENT:" + name + " variable.");
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variables.emplace("FILES_TMP_CONTENT:" + name, m.content);
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files_size = files_size + m.content.size();
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if (m.invalidQuote) {
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debug(4, "Multipart: Found invalid quoting.");
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this->invalidQuote = true;
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@ -41,7 +41,6 @@ bool MultipartBlob::processContent() {
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return false;
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}
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std::string firstLine = std::string(m_blob, offset, end);
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offset = end + 1;
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end = m_blob.find("\n", offset);
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if (end == std::string::npos) {
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@ -93,7 +92,8 @@ bool MultipartBlob::processContentDispositionLine(
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const std::string &dispositionLine) {
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size_t offset;
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if (dispositionLine.compare(21, 9, "form-data") != 0) {
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if (dispositionLine.size() < 30 ||
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dispositionLine.compare(21, 9, "form-data") != 0) {
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debug(4, "Multipart: Content-Disposition is unknown");
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return false;
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}
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