cve/2024/CVE-2024-36400.md

### [CVE-2024-36400](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-36400)
![](https://img.shields.io/static/v1?label=Product&message=nano-id&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3C%200.4.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-331%3A%20Insufficient%20Entropy&color=brighgreen)

### Description

nano-id is a unique string ID generator for Rust. Affected versions of the nano-id crate incorrectly generated IDs using a reduced character set in the `nano_id::base62` and `nano_id::base58` functions. Specifically, the `base62` function used a character set of 32 symbols instead of the intended 62 symbols, and the `base58` function used a character set of 16 symbols instead of the intended 58 symbols. Additionally, the `nano_id::gen` macro is also affected when a custom character set that is not a power of 2 in size is specified. It should be noted that `nano_id::base64` is not affected by this vulnerability. This can result in a significant reduction in entropy, making the generated IDs predictable and vulnerable to brute-force attacks when the IDs are used in security-sensitive contexts such as session tokens or unique identifiers. The vulnerability is fixed in 0.4.0.

### POC

#### Reference
- https://github.com/viz-rs/nano-id/security/advisories/GHSA-9hc7-6w9r-wj94

#### Github
No PoCs found on GitHub currently.