RUSTSEC-2021-0077: 
Rust vulnerability analysis and mitigation

The better-macro crate (RUSTSEC-2021-0077/CVE-2021-38196) is a vulnerability discovered in Rust's better-macro crate affecting versions through 2021-07-22. The vulnerability was intentionally created to demonstrate how remote attackers could execute arbitrary code via proc-macros, with no legitimate purpose (NVD).

The vulnerability is classified as a Code Injection issue (CWE-94) where the crate allows for improper control of code generation. The severity is rated as CRITICAL with a CVSS v3.1 Base Score of 9.8 (Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating high impact potential across confidentiality, integrity, and availability (NVD).

The vulnerability allows remote attackers to execute arbitrary code through proc-macros, potentially leading to complete system compromise. The high CVSS score indicates severe potential impacts on system confidentiality, integrity, and availability (NVD).

Users should immediately remove this crate from their dependencies as it has no legitimate purpose and was created specifically to demonstrate security vulnerabilities. No patches are available as the crate itself is considered malicious (NVD).