1 files changed, 4 insertions, 0 deletions
diff --git a/chrome/browser/extensions/sandboxed_extension_unpacker.cc b/chrome/browser/extensions/sandboxed_extension_unpacker.cc
index 86b4eea..1c5e319 100644
--- a/chrome/browser/extensions/sandboxed_extension_unpacker.cc
+++ b/chrome/browser/extensions/sandboxed_extension_unpacker.cc
@@ -213,6 +213,10 @@ bool SandboxedExtensionUnpacker::ValidateSignature() {
     ReportFailure("Excessively large key or signature");
     return false;
   }
+  if (header.key_size == 0) {
+    ReportFailure("Key length is zero");
+    return false;
+  }
 
   std::vector<uint8> key;
   key.resize(header.key_size);