Limit the number of opcodes in FromScript

sipa · Aug 19, 2021 · b59f17d · b59f17d
1 parent f7de269
commit b59f17d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/bitcoin/script/miniscript.h b/bitcoin/script/miniscript.h
@@ -1232,6 +1232,7 @@ inline NodeRef<typename Ctx::Key> FromScript(const CScript& script, const Ctx& c
     using namespace internal;
     std::vector<std::pair<opcodetype, std::vector<unsigned char>>> decomposed;
     if (!DecomposeScript(script, decomposed)) return {};
+    if (decomposed.size() > 201) return {};
     auto it = decomposed.begin();
     auto ret = DecodeMulti<typename Ctx::Key>(it, decomposed.end(), ctx);
     if (!ret) return {};