GnuPG (GPG) 1.0.2, and other versions up to 1.2.3, creates ElGamal type 20 (sign+encrypt) keys using the same key component for encryption as for signing, which allows attackers to determine the private key from a signature.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Privacy_guard | Gnu | 1.0.3 | 1.0.3 |
| Privacy_guard | Gnu | 1.2.1 | 1.2.1 |
| Privacy_guard | Gnu | 1.0.7 | 1.0.7 |
| Privacy_guard | Gnu | 1.0.5 | 1.0.5 |
| Privacy_guard | Gnu | 1.0.6 | 1.0.6 |
| Privacy_guard | Gnu | 1.2.2 | 1.2.2 |
| Privacy_guard | Gnu | 1.2.2 | 1.2.2 |
| Privacy_guard | Gnu | 1.0.2 | 1.0.2 |
| Privacy_guard | Gnu | 1.2.3 | 1.2.3 |
| Privacy_guard | Gnu | 1.2 | 1.2 |
| Privacy_guard | Gnu | 1.0.3b | 1.0.3b |
| Privacy_guard | Gnu | 1.0.4 | 1.0.4 |