From 5124b8978ba63151900b3e8835734ddc7e1e5c7b Mon Sep 17 00:00:00 2001
From: random-zebra <random.zebra@protonmail.com>
Date: Tue, 10 Sep 2019 16:31:15 +0200
Subject: [PATCH] [Spork] Do not accept sporks signed too far into the future

---
 src/spork.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/spork.cpp b/src/spork.cpp
index e9628fcf11aac..3d997f8a9acdd 100644
--- a/src/spork.cpp
+++ b/src/spork.cpp
@@ -66,6 +66,14 @@ void CSporkManager::ProcessSpork(CNode* pfrom, std::string& strCommand, CDataStr
         std::string strSpork = sporkManager.GetSporkNameByID(spork.nSporkID);
         if (strSpork == "Unknown") return;
 
+        // Do not accept sporks signed way too far into the future
+        if (spork.nTimeSigned > GetAdjustedTime() + 2 * 60 * 60) {
+            LOCK(cs_main);
+            LogPrintf("%s -- ERROR: too far into the future\n", __func__);
+            Misbehaving(pfrom->GetId(), 100);
+            return;
+        }
+
         uint256 hash = spork.GetHash();
         {
             LOCK(cs);