CVE-2024-34704
era-compiler-solidity contains a `xor(zext(cmp), -1)` misoptimization
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era-compiler-solidity contains a `xor(zext(cmp), -1)` misoptimization
| Assigner | GitHub_M |
| Reserved | 2024-05-07 |
| Published | 2024-05-13 |
| Updated | 2024-08-02 |
era-compiler-solidity is the ZKsync compiler for Solidity. The problem occurred during instruction selection in the `DAGCombine` phase while visiting the XOR operation. The issue arises when attempting to fold the expression `!(x cc y)` into `(x !cc y)`. To perform this transformation, the second operand of XOR should be a constant representing the true value. However, it was incorrectly assumed that -1 represents the true value, when in fact, 1 is the correct representation, so this transformation for this case should be skipped. This vulnerability is fixed in 1.4.1.
| CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
CWE-682: Incorrect Calculation
https://github.com/matter-labs/era-compiler-solidity/security/advisories/GHSA-22pj-7cvw-r3gc
