Out-of-bounds read in Vim - #VU134969

Detailed vulnerability description

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to out-of-bounds read in crypt_sodium_buffer_decode() when parsing a crafted libsodium-encrypted file. A remote attacker can trick the victim into opening a crafted file and entering a key to cause a denial of service.

Only instances built with the +sodium feature are vulnerable, and the issue affects files using the VimCrypt~04! or VimCrypt~05! encryption method.

Remediation

Sources

• https://github.com/vim/vim/security/advisories/GHSA-c4j9-wr9j-4486
• https://github.com/vim/vim/commit/c8777cec25dcfae89c42e9aff51af61f71c5745f