era-compiler-vype up to 1.3.9 initialization

Summaryinfo

A vulnerability classified as problematic was found in era-compiler-vype up to 1.3.9. Affected is an unknown function. Such manipulation leads to initialization. This vulnerability is uniquely identified as CVE-2023-46232. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in era-compiler-vype up to 1.3.9 and classified as problematic. Affected by this issue is an unknown function. The manipulation with an unknown input leads to a initialization vulnerability. Using CWE to declare the problem leads to CWE-665. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used. Impacted is integrity. CVE summarizes:

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 results in the second word’s index unset, that is effectively set to 0, so the first immutable value with the actual 0 index is overwritten in the ImmutableSimulator. Version 1.3.10 fixes this issue by setting all indexes in advance. The problem will go away, but it will get more expensive if the user allocates a lot of uninitialized space, e.g. `String[4096]`. Upgrading and redeploying affected contracts is the only way of working around the issue.

The weakness was disclosed 10/26/2023 as GHSA-h8jv-969m-94r4. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2023-46232 since 10/19/2023. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.3.10 eliminates this vulnerability. Applying the patch 8be305a1b9c68d0fd47dad3434224ed85944ca25 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• era-compiler-vype

Version

• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.3.5
• 1.3.6
• 1.3.7
• 1.3.8
• 1.3.9

License

• open-source

CPE 2.3info

• 🔍
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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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