🛡️ GHSA-32gq-x56h-299c — age

age vulnerable to malicious plugin names, recipients, or identities causing arbitrary binary execution

A plugin name containing a path separator may allow an attacker to execute an arbitrary binary.

Such a plugin name can be provided to the age CLI through an attacker-controlled recipient or identity string, or to the [plugin.NewIdentity](https://pkg.go.dev/filippo.io/age/plugin#NewIdentity), [plugin.NewIdentityWithoutData](https://pkg.go.dev/filippo.io/age/plugin#NewIdentityWithoutData), or [plugin.NewRecipient](https://pkg.go.dev/filippo.io/age/plugin#NewRecipient) APIs.

On UNIX systems, a directory matching ${TMPDIR:-/tmp}/age-plugin-* needs to exist for the attack to succeed.

The binary is executed with a single flag, either --age-plugin=recipient-v1 or --age-plugin=identity-v1. The standard input includes the recipient or identity string, and the random file key (if encrypting) or the header of the file (if decrypting). The format is constrained by the [age-plugin](https://c2sp.org/age-plugin) protocol.

An equivalent issue was fixed by the [rage](https://github.com/str4d/rage) project, see advisory [GHSA-4fg7-vxc8-qx5w](https://github.com/str4d/rage/security/advisories/GHSA-4fg7-vxc8-qx5w).

Thanks to ⬡-49016 for reporting this.