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PUBLISHED

CVE-2024-34704

era-compiler-solidity contains a `xor(zext(cmp), -1)` misoptimization

Reserved:2024-05-07
Published:2024-05-13
Updated:2024-05-13

Description

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.



MEDIUM: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Problem types

CWE-682: Incorrect Calculation

Product status

>= 1.2.0, <= 1.4.0
affected

References

https://github.com/matter-labs/era-compiler-solidity/security/advisories/GHSA-22pj-7cvw-r3gc

cve.org CVE-2024-34704

nvd.nist.gov CVE-2024-34704

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