Ernesto García

3 exploits Active since Jun 2023
CVE-2024-27094 WRITEUP MEDIUM WRITEUP
OpenZeppelin Contracts <5.0.2/4.9.6 - Memory Corruption
OpenZeppelin Contracts is a library for secure smart contract development. The `Base64.encode` function encodes a `bytes` input by iterating over it in chunks of 3 bytes. When this input is not a multiple of 3, the last iteration may read parts of the memory that are beyond the input buffer. The vulnerability is fixed in 5.0.2 and 4.9.6.
CVSS 6.5
CVE-2023-34234 WRITEUP MEDIUM WRITEUP
OpenZeppelin Contracts 4.3.0-4.9.0 - Missing Authorization in Governor Proposal Creation
OpenZeppelin Contracts is a library for smart contract development. By frontrunning the creation of a proposal, an attacker can become the proposer and gain the ability to cancel it. The attacker can do this repeatedly to try to prevent a proposal from being proposed at all. This impacts the `Governor` contract in v4.9.0 only, and the `GovernorCompatibilityBravo` contract since v4.3.0. This problem has been patched in 4.9.1 by introducing opt-in frontrunning protection. Users are advised to upgrade. Users unable to upgrade may submit the proposal creation transaction to an endpoint with frontrunning protection as a workaround.
CVSS 5.3
CVE-2024-27094 WRITEUP MEDIUM WRITEUP
OpenZeppelin Contracts <5.0.2/4.9.6 - Memory Corruption
OpenZeppelin Contracts is a library for secure smart contract development. The `Base64.encode` function encodes a `bytes` input by iterating over it in chunks of 3 bytes. When this input is not a multiple of 3, the last iteration may read parts of the memory that are beyond the input buffer. The vulnerability is fixed in 5.0.2 and 4.9.6.
CVSS 6.5