CVE-2024-43366 zkvyper ignored loop range bounds
A flaw in the zkvyper compiler could cause incorrect loop execution, potentially leading to loss of funds in smart contracts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-43366?
CVE-2024-43366 is a high-severity vulnerability in matter-labs era-compiler-vyper, published on 15 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
zkvyper is a Vyper compiler. Starting in version 1.3.12 and prior to version 1.5.3, since LLL IR has no Turing-incompletness restrictions, it is compiled to a loop with a much more late exit condition. It leads to a loss of funds or other unwanted behavior if the loop body contains it. However, more real-life use cases like iterating over an array are not affected. No contracts were affected by this issue, which was fixed in version 1.5.3. Upgrading and redeploying affected contracts is the only way to avoid the vulnerability.
Weakness: CWE-835
Which versions are affected by CVE-2024-43366?
It affects 1 product.
Products include Matter-Labs Zkvyper.
How do I fix CVE-2024-43366?
No fix has been published for CVE-2024-43366 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-43366 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-43366 exists.
Other vulnerabilities in matter-labs era-compiler-vyper
Sources
Also known as GHSA-8j77-7rrv-6pxx.