GHSA-32gq-x56h-299c
age vulnerable to malicious plugin names, recipients, or identities causing arbitrary binary execution
Quick fix
GHSA-32gq-x56h-299c — filippo.io/age: upgrade to the fixed version with the command below.
go get filippo.io/age@v1.2.1Details
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.
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