CVE-2024-45056

MEDIUM EPSS 32.1%
Published Aug 29, 20241y ago · Modified Jun 17, 20262w ago
5.9 CVSS 3.1
Medium
Find Similar
Published Aug 29, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

zksolc is a Solidity compiler for ZKsync. All LLVM versions since 2015 fold `(xor (shl 1, x), -1)` to `(rotl ~1, x)` if run with optimizations enabled. Here `~1` is generated as an unsigned 64 bits number (`2^64-1`). This number is zero-extended to 256 bits on EraVM target while it should have been sign-extended. Thus instead of producing `roti 2^256 - 1, x` the compiler produces `rotl 2^64 - 1, x`. Analysis has shown that no contracts were affected by the date of publishing this advisory. This issue has been addressed in version 1.5.3. Users are advised to upgrade and redeploy all contracts. There are no known workarounds for this vulnerability.

CVSS Details

Base Score
5.9
Exploitability
2.2
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
32.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-682

Affected Products 1

VendorProductVersionRange
matter-labszksolc* <1.5.3

References 2

  • github.com https://github.com/llvm/llvm-project/commit/e48237df95b49a36b8ffceb78c8a58f4be1b4344
    Patch
  • github.com https://github.com/matter-labs/era-compiler-solidity/security/advisories/GHSA-fpx7-8vc6-frjj
    Vendor Advisory

Remediation

  • github.com https://github.com/llvm/llvm-project/commit/e48237df95b49a36b8ffceb78c8a58f4be1b4344
    Patch