strstr etc

Server/GameServer/Game/Struct/CalculateStat.cpp

@@ -6138,19 +6138,38 @@ void StructCreature::checkAdditionalItemEffect()
 
 
 		// Fraun Sky Accessories 7/12/2025
+		// Fix: the bonus is stored as (bitset, base, per-level) triples - the same layout the
+		// engine uses for EF_PARAMETER_INC (see _applyEffectForState: incParameter(fValue[k],
+		// fValue[k+1] + fValue[k+2]*level, ...)) and the client tooltip
+		// (ReplaceAdditionalItemEffectOptionTooltip walks value[n]/[n+1]/[n+2], stride 3).
+		// The old loop walked the triples but always read fValue[1]/[2] of triple 0, passing
+		// the *amount* as the stat selector bitset and the *per-level* term (normally 0) as the
+		// value -> worn sky accessories granted nothing even though the tooltip advertised a
+		// bonus. Apply each non-empty triple the same way the engine does instead.
 		if (pEquipment->GetItemAdditionalEffect() > 0)
 		{
 			const std::vector<EffectInfo* >* Effect = GameContent::GetEffectInfoVector(pEquipment->GetItemAdditionalEffect());
 
 			if (Effect->size() > 0)
 			{
-				for (int eff = 0; eff < 20; )
+				EffectInfo * pSkyEffect = Effect->at(0);
+
+				// 6 triples fit in fValue[NUMBER_OF_VALUE(=20)]; stop at eff+2 < NUMBER_OF_VALUE
+				// so fValue[eff+1] / fValue[eff+2] stay in bounds.
+				for (int eff = 0; eff + 2 < EffectInfo::NUMBER_OF_VALUE; eff += 3)
 				{
-					if (Effect->at(0)->fValue[eff] != 0)
+					if (pSkyEffect->fValue[eff] == 0)
-					{
+						continue;
-						incParameter(Effect->at(0)->fValue[1], Effect->at(0)->fValue[2], true);
+
-					}
+					const c_fixed10 fAmount = pSkyEffect->fValue[eff + 1] + pSkyEffect->fValue[eff + 2] * pSkyEffect->nEffectLevel;
-					eff += 3;
+
+					// fValue[eff] is the stat/attribute selector bitset. Apply it both as a base
+					// stat (STR/VIT/... under bStat=true) and as an attribute (attack/defence/...
+					// under bStat=false): the two branches of incParameter() test disjoint flag
+					// sets, so whichever the effect row encodes is applied exactly once and the
+					// result matches what the client tooltip shows.
+					incParameter(pSkyEffect->fValue[eff], fAmount, true);
+					incParameter(pSkyEffect->fValue[eff], fAmount, false);
 				}
 			}
 		}

Server/GameServer/Game/Struct/StructPlayer.cpp

@@ -5573,6 +5573,68 @@ void StructPlayer::SetDialogTitle( const char *szString, int type )
 	m_strSpecialDialogMenu.clear();
 }
 
+// --- Fraun security fix: NPC dialog trigger validation -------------------------------
+// The client echoes dialog triggers back to the server, which then runs them through
+// LUA()->RunString() (see onDialog in GameMessage.cpp). Validation used to be a substring
+// test (strstr), so a crafted / man-in-the-middled TS_CS_DIALOG packet could embed a
+// legitimate trigger substring and append arbitrary Lua, e.g.
+//     on_channel_set(1) os.execute("...")
+// Because the Lua VM is opened with luaL_openlibs (os/io included), that is full remote
+// code execution on the server host. The validators below now constrain the trigger to
+// exactly the shapes the real client can produce.
+//
+// A "special" dialog menu is a parameterised trigger: the server hands out a prefix
+// (e.g. "on_channel_set", "warp_to_secret_dungeon") and the client completes it with a
+// numeric argument list -> "prefix(<numbers>)" (client builds it as "%s(%s)" / "%s()" in
+// SUIInputNumberWnd / SGameInterface). This helper accepts ONLY that shape: the trigger
+// must start with the prefix and the remainder may contain nothing but a single
+// parenthesised list of digits / signs / dots / commas / whitespace. That lets the client
+// pick a number while making it impossible to chain extra Lua statements.
+static bool IsSafeSpecialDialogTrigger( const char * szTrigger, const char * szPrefix )
+{
+	if( !szTrigger || !szPrefix || !*szPrefix )
+		return false;
+
+	const size_t nPrefixLen = strlen( szPrefix );
+
+	// Must START with the offered prefix (not merely contain it).
+	if( strncmp( szTrigger, szPrefix, nPrefixLen ) != 0 )
+		return false;
+
+	const char * p = szTrigger + nPrefixLen;
+
+	while( *p == ' ' || *p == '\t' ) ++p;		// optional whitespace before '('
+
+	if( *p == '\0' )
+		return true;							// bare prefix, e.g. "exit_indun"
+
+	if( *p != '(' )
+		return false;							// anything other than an arg list -> reject
+	++p;
+
+	// Argument list: numbers only. No quotes, letters, ';', '=', '[', a second '(' etc.,
+	// so no further Lua statement can be smuggled in.
+	while( *p && *p != ')' )
+	{
+		const char c = *p;
+		const bool bAllowed =
+			( c >= '0' && c <= '9' ) ||
+			c == ',' || c == '.' || c == '-' || c == '+' || c == ' ' || c == '\t';
+		if( !bAllowed )
+			return false;
+		++p;
+	}
+
+	if( *p != ')' )
+		return false;							// unterminated argument list
+	++p;
+
+	while( *p == ' ' || *p == '\t' ) ++p;		// optional trailing whitespace
+
+	return *p == '\0';							// nothing may follow the ')'
+}
+// -------------------------------------------------------------------------------------
+
 void StructPlayer::SetFixedDialogTrigger( const char *szString )
 {
 	m_strFixedDialogTrigger = szString;
@@ -5580,7 +5642,11 @@ void StructPlayer::SetFixedDialogTrigger( const char *szString )
 
 bool StructPlayer::IsFixedDialogTrigger( const char * szTrigger )
 {
-	if( m_strFixedDialogTrigger.size() && strstr( szTrigger, m_strFixedDialogTrigger.c_str() ) )
+	// Fraun security fix: the fixed trigger is a complete, server-generated string that the
+	// client echoes back verbatim (e.g. "recall_feather( x, y, layer )" -> SUINotifyWnd sends
+	// it back with "%s"), so it must match EXACTLY. strstr() let a crafted packet keep the
+	// trigger as a prefix and append Lua after it.
+	if( m_strFixedDialogTrigger.size() && !strcmp( szTrigger, m_strFixedDialogTrigger.c_str() ) )
 		return true;
 
 	return false;
@@ -5614,7 +5680,8 @@ void StructPlayer::SetSpecialDialogMenu( const char * szString )
 
 bool StructPlayer::IsSpecialDialogMenu( const char * szString )
 {
-	return( m_strSpecialDialogMenu.size() && strstr( szString, m_strSpecialDialogMenu.c_str() ) );
+	// Fraun security fix: was strstr() (substring) -> now require "<prefix>(<numeric args>)".
+	return( m_strSpecialDialogMenu.size() && IsSafeSpecialDialogTrigger( szString, m_strSpecialDialogMenu.c_str() ) );
 }
 
 void StructPlayer::ClearSpecialDialogMenu()
@@ -5769,7 +5836,8 @@ bool StructPlayer::IsValidTrigger( const char *szTrigger )
 		if( !strcmp( strTriggerList[idx].c_str(), szTrigger ) ) return true;
 	}
 
-	if( m_strSpecialDialogMenu.size() && strstr( szTrigger, m_strSpecialDialogMenu.c_str() ) )
+	// Fraun security fix: was strstr() (substring) -> now require "<prefix>(<numeric args>)".
+	if( m_strSpecialDialogMenu.size() && IsSafeSpecialDialogTrigger( szTrigger, m_strSpecialDialogMenu.c_str() ) )
 		return true;
 
 	return false;