CVE-2023-46232 — era-compiler-vyper is the EraVM Vyper compiler for zkSync Era, a layer 2 rollup

era-compiler-vyper is the EraVM Vyper compiler for zkSync Era, a layer 2 rollup that uses zero-knowledge proofs to scale Ethereum. Prior to era-compiler-vype version 1.3.10, a bug prevented the initialization of the first immutable variable for Vyper contracts meeting certain cri

01What is this vulnerability?

era-compiler-vyper is the EraVM Vyper compiler for zkSync Era, a layer 2 rollup that uses zero-knowledge proofs to scale Ethereum. Prior to era-compiler-vype version 1.3.10, a bug prevented the initialization of the first immutable variable for Vyper contracts meeting certain criteria. The problem arises when there is a String or Array with more 256-bit words allocated than initialized. It…

02Affected products

Vendor	Product	Versions
matter-labs	era	compiler-vyper — < 1.3.10

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-10-25T21:01:51.692Z
• Last modified: 2024-09-10T14:02:31.551Z

09References

• github.com — https://github.com/matter-labs/era-compiler-vyper/security/advisories/GHSA-h8jv-…
• github.com — https://github.com/matter-labs/era-compiler-vyper/commit/8be305a1b9c68d0fd47dad3…
• github.com — https://github.com/matter-labs/era-system-contracts/blob/main/contracts/Immutabl…