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| -rw-r--r-- | src/main.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/main.cpp b/src/main.cpp index 1821576dc5..1860f471da 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -1970,6 +1970,28 @@ bool CAlert::ProcessAlert() if (!IsInEffect()) return false; + // alert.nID=max is reserved for if the alert key is + // compromised. It must have a pre-defined message, + // must never expire, must apply to all versions, + // and must cancel all previous + // alerts or it will be ignored (so an attacker can't + // send an "everything is OK, don't panic" version that + // cannot be overridden): + int maxInt = std::numeric_limits<int>::max(); + if (nID == maxInt) + { + if (!( + nExpiration == maxInt && + nCancel == (maxInt-1) && + nMinVer == 0 && + nMaxVer == maxInt && + setSubVer.empty() && + nPriority == maxInt && + strStatusBar == "URGENT: Alert key compromised, upgrade required" + )) + return false; + } + CRITICAL_BLOCK(cs_mapAlerts) { // Cancel previous alerts |