Eval Injection in Vim - #VU131626

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to improper neutralization of directives in dynamically evaluated code in s:stepmatch() in the cucumber filetype plugin when processing crafted step-definition regex patterns from repository .rb files during step-jump handling. A remote attacker can place a specially crafted step-definition pattern in an attacker-controlled repository to execute arbitrary code.

Exploitation requires a Vim build with +ruby support and user interaction to invoke a step-jump mapping on a matching feature line.

Remediation

Sources

• https://github.com/vim/vim/security/advisories/GHSA-4473-94jm-w5x9
• https://github.com/vim/vim/commit/a65a52d684bc58535ad28a4ae824d22e76399934