// For flags

CVE-2024-34704

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

Severity Score

5.9
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

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.

era-compiler-solidity es el compilador ZKsync para Solidity. El problema ocurrió durante la selección de instrucciones en la fase "DAGCombine" mientras se visitaba la operación XOR. El problema surge al intentar doblar la expresión `!(x cc y)` en `(x !cc y)`. Para realizar esta transformación, el segundo operando de XOR debe ser una constante que represente el valor verdadero. Sin embargo, se asumió incorrectamente que -1 representa el valor verdadero, cuando en realidad 1 es la representación correcta, por lo que se debe omitir esta transformación en este caso. Esta vulnerabilidad se solucionó en 1.4.1.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
Poc
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-05-07 CVE Reserved
  • 2024-05-13 CVE Published
  • 2024-05-14 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-682: Incorrect Calculation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Matter-labs
Search vendor "Matter-labs"
 Era-compiler-solidity
Search vendor "Matter-labs" for product "Era-compiler-solidity"
 >= 1.2.0 <= 1.4.0
Search vendor "Matter-labs" for product "Era-compiler-solidity" and version " >= 1.2.0 <= 1.4.0"
en
Affected