Code Injection in Vim - #VU135701

Detailed vulnerability description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to improper neutralization of special elements in the C omni-completion script in runtime/autoload/ccomplete.vim when processing type information from a tags entry during omni-completion. A local user can supply a crafted tags entry and trick the victim into invoking C omni-completion on a hostile .c file to execute arbitrary code.

User interaction is required to open a hostile .c file and invoke omni-completion on a structure-member access, and the issue is reachable only when filetype plugins are enabled and a reachable tags file is used.

Remediation

Sources

• https://github.com/vim/vim/security/advisories/GHSA-mf92-v4xw-j45x
• https://github.com/vim/vim/commit/6b611b0d15603c52ebdad17172b0232b4f65704e