This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis β
Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: Vyper `slice()` function has a boundary check overflow bug. π **Consequences**: Allows Out-of-Bounds (OOB) access to storage, memory, or call data.β¦
π‘οΈ **CWE**: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). π **Flaw**: The `slice()` function in Vyper fails to properly validate boundaries, causing an overflow in its checks.
Q3Who is affected? (Versions/Components)
π¦ **Vendor**: vyperlang. π¦ **Product**: Vyper (Pythonic smart contract language for EVM). β οΈ **Affected**: Versions **0.3.10 and earlier**. Newer versions are safe.
π **Threshold**: Low. π **Vector**: Network (AV:N). π« **Auth**: None required (PR:N). π€ **User**: No interaction needed (UI:N). AC:L (Low Complexity). This is a remote, unauthenticated, easy-to-exploit vulnerability.
Q6Is there a public Exp? (PoC/Wild Exploitation)
π΅οΈ **Public Exp**: No specific PoC code provided in the data. π **References**: GitHub Advisory (GHSA-9x7f-gwxq-6f2c) and Issue #3756 confirm the flaw.β¦
β **Fixed**: Yes. The vulnerability is tracked in GitHub Security Advisories. π **Published**: Feb 1, 2024. π **Action**: Upgrade Vyper compiler to a version **newer than 0.3.10** to apply the fix.
Q9What if no patch? (Workaround)
π§ **Workaround**: If stuck on old version, **avoid using `slice()`** entirely. π **Mitigation**: Manually implement safe boundary checks before slicing.β¦